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Vanga
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| Vangidae | |
|---|---|
| White-headed vanga (Artamella viridis) | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Passeriformes |
| Superfamily: | Malaconotoidea |
| Family: | Vangidae Swainson, 1831 |
| Genera | |
|
21, see text | |
| Synonyms | |
|
Tephrodornithidae | |
The family Vangidae (from vanga, Malagasy for the hook-billed vanga, Vanga curvirostris)[1] comprises a group of often shrike-like medium-sized birds distributed from Asia to Africa, including the vangas of Madagascar to which the family owes its name. Many species in this family were previously classified elsewhere in other families. Recent molecular techniques made it possible to assign these species to Vangidae, thereby solving several taxonomic enigmas. The family contains 40 species divided into 21 genera.
Taxonomy
[edit]In addition to the small set of Malagasy species traditionally called the vangas, Vangidae includes some Asian groups: the woodshrikes (Tephrodornis), flycatcher-shrikes (Hemipus) and philentomas.[2]
Vangidae belongs to a clade of corvid birds that also includes bushshrikes (Malaconotidae), ioras (Aegithinidae) and the Australian butcherbirds, magpies and currawongs (Cracticidae) and woodswallows (Artamidae), which has been defined as the superfamily Malaconotoidea.[3] They seem closely related to some enigmatic African groups: the helmetshrikes (Prionops) and the shrike-flycatchers (Bias and Megabyas).[4]
On Madagascar, vangas were traditionally believed to be a small family of shrike-like birds. Recent research suggests that several Madagascan taxa most similar in appearance and habits (and formerly considered to be) Old World warblers, Old World flycatchers or Old World babblers may be vangas. Yamagishi et al. found in 2001 that Newtonia appeared to belong with the vangas rather than the warblers and also that Tylas was a vanga and not a bulbul.[5] It also appears that Ward's flycatcher and Crossley's babbler belong with the vangas.[6][7][8]
The phylogenetic relationships between the genera are shown below. The cladogram is based on a study by Sushma Reddy and collaborators that was published in 2012. The species in the subfamily Vanginae are endemic to Madagascar.[9]
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Description
[edit]The vangas are an example of adaptive radiation, having evolved from a single founding population into a variety of forms adapted to various niches occupied by other bird families in other parts of the world.[10] They differ in size, colour and bill shape but are similar in skull shape and bony palate structure.[11] They are small to medium-sized birds, varying from 12 to 32 cm in length.[12] Many have strong, hooked bills similar to those of shrikes. The helmet vanga has a particularly large bill with a casque on top. Other species, such as the newtonias, have a small, thin bill. The sickle-billed vanga is notable for its long, curved bill used to probe into holes and cracks.[11]
Most vangas are largely black, brown or grey above and white below. Exceptions include the blue and white blue vanga and the blue-grey nuthatch vanga. The helmet vanga is mostly black with a rufous back. Male Bernier's vangas are entirely black while the females are brown. It is one of several species with distinct male and female plumage while in other species the sexes are identical.[12]
Most vangas have whistling calls.[12]
Distribution and habitat
[edit]They are native to Sub-Saharan Africa and the Indomalayan realm, although most are endemic to Madagascar in a variety of forest and scrub habitats. Several species including Van Dam's vanga and sickle-billed vanga can be found in the dry deciduous forests in the west of the island. Some such as Crossley's babbler, helmet vanga and Bernier's vanga are restricted to rainforest in the east of the island. Lafresnaye's vanga and the recently discovered red-shouldered vanga occur in subarid thorn scrub in the south-west.[12]
Behaviour
[edit]
Their diet can include insects, earthworms, millipedes, lizards and amphibians.[11] The blue vanga and chabert vanga occasionally eat fruit.[10] Many species feed in small groups, often in mixed-species foraging flocks. The hook-billed vanga and Lafresnaye's vanga tend to forage alone.[11] Vangas have a variety of different foraging strategies. Many species glean food as they move through the branches. The nuthatch vanga climbs up trunks and branches like a nuthatch but does not climb downwards as nuthatches do.[12] Crossley's babbler forages by walking along the forest floor amongst the leaf litter.[12] The chabert vanga and the tylas vanga often fly into the air to catch prey. The three Xenopirostris vangas use their laterally flattened bills to strip bark off trees to search for food underneath.[10]
Most species nest in pairs, building cup-shaped nests using twigs, bark, roots and leaves. The sickle-billed vanga nests in groups and builds a large nest of sticks.[11]
Status and conservation
[edit]Some species of vanga are common such as the chabert vanga which can survive in secondary woodland and plantations of introduced trees.[12] Several other species are threatened by loss of their forest habitat. Pollen's vanga is classed as near-threatened by BirdLife International and the red-shouldered vanga, Bernier's vanga, helmet vanga and red-tailed newtonia are regarded as vulnerable. Van Dam's vanga is classed as endangered because it is restricted to a small area of north-west Madagascar where the forest is rapidly disappearing due to clearance for agriculture and uncontrolled bushfires.[13]
Species list
[edit]


The family contains 21 genera and 40 species.[14]
FAMILY: VANGIDAE
- Genus: Calicalicus
- Red-tailed vanga, Calicalicus madagascariensis
- Red-shouldered vanga, Calicalicus rufocarpalis
- Genus: Schetba
- Rufous vanga, Schetba rufa
- Genus: Vanga
- Hook-billed vanga, Vanga curvirostris
- Genus: Xenopirostris
- Lafresnaye's vanga, Xenopirostris xenopirostris
- Van Dam's vanga, Xenopirostris damii
- Pollen's vanga, Xenopirostris polleni
- Genus: Falculea
- Sickle-billed vanga, Falculea palliata
- Genus: Artamella
- White-headed vanga, Artamella viridis
- Genus: Leptopterus
- Chabert vanga, Leptopterus chabert
- Genus: Cyanolanius
- Madagascar blue vanga, Cyanolanius madagascarinus
- Comoros blue vanga, Cyanolanius comorensis.
- Genus: Oriolia
- Bernier's vanga, Oriolia bernieri
- Genus: Euryceros
- Helmet vanga, Euryceros prevostii
- Genus: Tylas
- Tylas vanga, Tylas eduardi
- Genus: Hypositta
- Nuthatch vanga or coral-billed nuthatch vanga, Hypositta corallirostris
- Genus: Newtonia
- Northern dark newtonia, Newtonia amphichroa
- Southern dark newtonia, Newtonia lavarambo (sometimes considered a subspecies of N. amphicroa)
- Common newtonia, Newtonia brunneicauda
- Archbold's newtonia, Newtonia archboldi
- Red-tailed newtonia, Newtonia fanovanae
- Genus: Prionops
- Yellow-crested helmetshrike, Prionops alberti
- Red-billed helmetshrike, Prionops caniceps
- Rufous-bellied helmetshrike, Prionops rufiventris
- Gabela helmetshrike, Prionops gabela
- White-crested helmetshrike, Prionops plumatus
- Grey-crested helmetshrike, Prionops poliolophus
- Retz's helmetshrike, Prionops retzii
- Chestnut-fronted helmetshrike, Prionops scopifrons
- Genus: Mystacornis
- Crossley's babbler, Mystacornis crossleyi
- Genus: Bias
- Black-and-white shrike-flycatcher, Bias musicus
- Genus: Megabyas
- African shrike-flycatcher, Megabyas flammulatus
- Genus: Hemipus
- Black-winged flycatcher-shrike, Hemipus hirundinaceus
- Bar-winged flycatcher-shrike, Hemipus picatus
- Genus: Tephrodornis
- Large woodshrike, Tephrodornis gularis
- Malabar woodshrike, Tephrodornis sylvicola
- Common woodshrike, Tephrodornis pondicerianus
- Sri Lanka woodshrike, Tephrodornis affinis
- Genus: Philentoma
- Rufous-winged philentoma, Philentoma pyrhoptera
- Maroon-breasted philentoma, Philentoma velata
- Genus: Pseudobias
- Ward's flycatcher, Pseudobias wardi
References
[edit]- ^ Jobling, James A. (1991). A Dictionary of Scientific Bird Names. Oxford University Press. p. 242. ISBN 0-19-854634-3.
- ^ Moyle, R.G., J. Cracraft, M. Lakim, J. Nais & F.H. Sheldon (2006), Reconsideration of the phylogenetic relationships of the enigmatic Bornean Bristlehead (Pityriasis gymnocephala), Mol. Phylogenet. Evol. 39, 893–898.
- ^ Cracraft, Joel, Barker F. Keith, Braun, Michael, Harshman, John, Dyke, Gareth J., Feinstein, Julie, Stanley, Scott, Cibois, Alice, Schikler, Peter, Beresford, Pamela, García-Moreno, Jaime, Sorenson, Michael D., Yuri, Tamaki, Mindell, David P. (2004). "Phylogenetic relationships among modern birds (Neornithes): toward an avian tree of life". In Cracraft J, Donoghue MJ (eds.). Assembling the tree of life. New York, New York: Oxford University Press. pp. 468–89. ISBN 0-19-517234-5.
- ^ Fuchs, J.; Bowie, R.C.K.; Fjeldsa, J. & Pasquet, E. (2004): Phylogenetic relationships of the African bush-shrikes and helmet-shrikes (Passeriformes: Malaconotidae). Mol. Phylogenet. Evol. 33(2): 428–439.
- ^ Yamagishi, S.; Honda, M.; Eguchi, K. & Thorstrom, R. (2001): Extreme endemic radiation of the Malagasy Vangas (Aves: Passeriformes). J. Mol. Evol. 53(1): 39–46. Abstract
- ^ Cibois, A.; Pasquet, E. & Schulenberg, T.S. (1999): HTML Molecular systematics of the Malagasy babblers (Timaliidae) and Warblers (Sylviidae), based on cytochrome b and 16S rRNA sequences. Mol. Phylogenet. Evol. 13(3): 581–595.
- ^ Cibois, A.; Slikas, B.; Schulenberg, T.S. & Pasquet, E. (2001): An endemic radiation of Malagasy songbirds is revealed by mitochondrial DNA sequence data. Evolution 55(6): 1198–1206. PDF fulltext Archived 2011-07-27 at the Wayback Machine
- ^ Schulenberg, T.S. (2003): The Radiations of Passerine Birds on Madagascar. In: Goodman, Steven M. & Benstead, Jonathan P. (eds.): The Natural History of Madagascar: 1130–1134. University of Chicago Press. ISBN 0-226-30306-3
- ^ Reddy, S.; Driskell, A.; Rabosky, D.L.; Hackett, S.J.; Schulenberg, T.S. (2012). "Diversification and the adaptive radiation of the vangas of Madagascar". Proceedings of the Royal Society B: Biological Sciences. 279 (1735): 2062–2071. doi:10.1098/rspb.2011.2380. PMC 3311898.
- ^ a b c Garbutt, Nick (2004) Different by design: the Vangas of Madagascar, in: Africa – Birds & Birding, 9: 28–34.
- ^ a b c d e Perrins, Christopher, ed. (2004) The New Encyclopedia of Birds, Oxford University Press, Oxford.
- ^ a b c d e f g Sinclair, Ian & Olivier, Langrand (1998) Birds of the Indian Ocean Islands, Struik, Cape Town.
- ^ BirdLife International (2009) Species factsheet: Xenopirostris damii. Downloaded from http://www.birdlife.org on 2/1/2010.
- ^ Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (January 2023). "Batises, bushshrikes, boatbills, vangas (sensu lato)". IOC World Bird List Version 13.1. International Ornithologists' Union. Retrieved 25 March 2023.
External links
[edit]- Vanga videos on the Internet Bird Collection
- Vangas, Bird Families of the World
Vanga
View on GrokipediaTaxonomy and evolution
Classification history
The classification of vangas within the family Vangidae began in the early 19th century, when French ornithologist René Primevère Lesson established the family in 1831 based on the distinctive hooked bills of Malagasy species like the hook-billed vanga (Vanga curvirostris), initially placing them near shrikes (Laniidae) due to superficial similarities in bill structure and predatory habits.[4] German ornithologist Gustav Hartlaub further contributed to early taxonomic descriptions in the 1860s, describing genera such as Tylas and reinforcing the shrike-like affinities through morphological comparisons in his works on Malagasy avifauna.[4] Throughout the 20th century, taxonomic debates centered on the monophyly of Vangidae, with morphological analyses questioning the unity of the group and leading to reassignments of certain genera. For instance, early 20th-century studies by Pycraft (1907) proposed links to Australasian woodswallows and butcherbirds, suggesting an eastern dispersal route to Madagascar, while later morphological reviews excluded genera like Newtonia (previously in Sylviidae) and Tylas from Vangidae due to differences in skeletal and plumage traits, treating them as distinct lineages.[4] These shifts highlighted ongoing uncertainties, as some species were alternately included or excluded based on limited comparative anatomy, contributing to a fragmented understanding of vanga relationships.[4] A pivotal advancement came in 2012 with a comprehensive molecular phylogenetic study by Reddy et al., which analyzed DNA sequences from 13 genes across all 15 recognized Malagasy vanga genera, confirming the monophyly of the core Vanginae radiation while resolving the inclusion of aberrant shrike-like corvoids from Africa and Asia.[5] This work expanded Vangidae to encompass 21 genera total, reintegrating Newtonia and Tylas into the family and incorporating taxa such as helmetshrikes (Prionops) and woodshrikes (Tephrodornis), based on strong Bayesian and maximum-likelihood support for these broadened affinities.[5] The study established the current taxonomic framework, emphasizing a unified evolutionary history originating from corvoid ancestors.[5]Phylogenetic relationships
The Vangidae family is positioned within the Corvida clade of the order Passeriformes, encompassing core corvoid oscines, and shares close phylogenetic affinities with families such as the cuckoo-shrikes (Campephagidae) based on molecular analyses of nuclear and mitochondrial loci. This placement reflects the family's integration into a diverse assemblage of Old World passerines that originated in the Indo-Pacific region, with subsequent radiations across Africa and Asia.[6] Molecular evidence supports a monophyletic radiation of approximately 22 vanga species endemic to Madagascar, nested within a broader Afro-Asian Vangidae group totaling around 40 species.[6] This Malagasy clade represents a derived lineage that diverged after initial colonizations from continental Africa and Asia, as revealed by multi-locus phylogenies incorporating both mitochondrial and nuclear DNA sequences. Historically, genera such as Euryceros and Hypositta were misclassified outside the Vangidae due to morphological convergence, but molecular phylogenetic studies, particularly Reddy et al. (2012), resolved their inclusion within the family.[6] Reddy et al. (2012) employed nuclear DNA markers alongside mtDNA to reconstruct a comprehensive phylogeny, demonstrating stepwise colonization patterns where Malagasy vangas arose from multiple Afro-Asian ancestors, with divergence times estimated around 20–30 million years ago.[6] These findings underscore the role of vicariance and dispersal in shaping inter-genus relationships, positioning the Malagasy radiation as a subclade amid more basal continental lineages like the helmetshrikes (Prionops).Adaptive radiation in Madagascar
The adaptive radiation of the Vangidae in Madagascar began with the colonization of the island by an ancestral vanga lineage approximately 22–29 million years ago during the late Oligocene, following the long-term isolation of Madagascar from other landmasses since its separation from India around 88 million years ago. This event initiated a rapid diversification that produced 22 endemic species, which have evolved to occupy a wide array of ecological niches analogous to those filled by distantly related birds elsewhere, such as shrikes through aerial sallying, woodcreepers via trunk-climbing and probing, and nuthatches with bark-gleaning behaviors. The radiation exemplifies classic patterns of island evolution, where the arrival of a single lineage exploits unoccupied resources in a novel environment, leading to ecomorphological divergence driven by specialized foraging strategies.[6] Speciation rates in the Malagasy vangas were exceptionally high in the initial phases following colonization, with an explosive burst around 23 million years ago that accounted for much of the early lineage accumulation, but these rates subsequently declined dramatically toward stasis in more recent epochs. This temporal pattern, analyzed through fossil-calibrated phylogenies, indicates that the most intense diversification occurred soon after arrival, filling available niches before ecological saturation limited further splitting. A secondary peak in speciation between 10 and 5 million years ago further contributed to species richness, potentially linked to innovations in bill morphology that opened new foraging opportunities.[5][6] Key drivers of this radiation include Madagascar's prolonged geographic isolation, which prevented gene flow and competition from continental faunas, coupled with the island's diverse habitats ranging from humid rainforests to dry spiny forests that provided varied ecological opportunities. The post-Mesozoic separation from Gondwana remnants created a depauperate avifauna upon vanga arrival, allowing the clade to radiate without intense interspecific competition and adapt to multiple trophic levels through convergent evolution of traits suited to local conditions. This process has resulted in one of the most striking examples of avian adaptive radiation on an oceanic island, with the Malagasy vangas demonstrating how ecological opportunity can fuel extraordinary biodiversity in isolation.[6][5]Physical description
Morphology and size variation
Vangas in the family Vangidae display considerable variation in body size, ranging from small to medium-sized passerines with total lengths of 12–32 cm and weights of 15–114 g. The smallest species, the nuthatch vanga (Hypositta corallirostris), measures approximately 12–14 cm in length and weighs 13.5–14.5 g.[7][8] In contrast, the largest, the sickle-billed vanga (Falculea palliata), reaches up to 32 cm in length and 114 g in weight.[9] This size spectrum reflects the family's adaptive radiation, with most species falling between 15–25 cm and 20–80 g, such as the hook-billed vanga (Vanga curvirostris) at 25–29 cm and 54–80 g.[10] A hallmark of vanga morphology is the diversity in bill shapes, which vary significantly across genera despite a conserved skull structure. Hooked bills are characteristic of the genus Vanga, exemplified by the robust, curved bill of the hook-billed vanga used in its predatory habits.[11] Sickle-shaped bills appear in Falculea, as seen in the sickle-billed vanga with its long, decurved mandible.[12] Straight and slender bills occur in genera like Cyanolanius, where the blue vanga (Cyanolanius madagascarinus) possesses a fine, pointed bill measuring about 16–18 mm.[13] This bill variation contributes to the family's ecomorphological distinctiveness, with over a dozen unique forms documented among the approximately 21 Malagasy species.[14][8] Leg and foot structures in vangas also exhibit notable variation tied to locomotor demands. Arboreal species typically have relatively weak legs and feet suited for perching and climbing on branches, with shorter tarsi and less robust phalanges.[15] In contrast, ground-foraging species like Crossley's babbler (Mystacornis crossleyi) feature stronger, more muscular legs and feet, including elongated toes and reinforced tarsometatarsi for terrestrial locomotion such as hopping and scratching.[15] These differences underscore the pedal morphology's role in the family's ecological diversification, with quantitative analyses showing correlated changes in bone length and muscle attachment sites across clades.[15]Plumage patterns and dimorphism
Vangas display a diverse array of plumage patterns, often dominated by black, gray, or blue tones on the upperparts contrasted with white underparts, reflecting their adaptive radiation within Madagascar's forests. Most species exhibit this bicolored scheme, with variations in gloss, streaking, or rufous accents enhancing camouflage or signaling. For example, the Chabert's vanga (Leptopterus chabert) features glossy black upperparts with a subtle blue sheen and crisp white underparts, creating a striking pied appearance.[16] The blue vanga (Cyanolanius madagascarinus) showcases vibrant blue upperparts, including the head and wings, paired with immaculate white underparts in adult males, while the edges of the wing coverts show dull bluish-green tinges.[17] Another notable example is the red-shouldered vanga (Calicalicus rufocarpalis), described in 1997, where males exhibit pale reddish shoulders and rump against olive-tinged gray-brown upperparts, with brick-red lesser wing coverts adding a warm accent.[18] Sexual dimorphism in plumage occurs in approximately 50% of vanga species, typically with males bearing brighter, more contrasting colors possibly linked to mate attraction, while females are duller for camouflage during nesting. In the Tylas vanga (Tylas eduardsii), males display brighter overall plumage, including a black head, nape, and chin, contrasting with the female's more olive-gray forecrown and upperparts.[19] The red-tailed vanga (Calicalicus madagascariensis) exemplifies strong dimorphism, with males showing vivid rufous tail and underparts against gray upperparts, while females are browner and less saturated.[20] Conversely, species like the Chabert's vanga exhibit minimal sexual differences, with both sexes sharing similar black-and-white patterns. In Bernier's vanga (Urathectes bernieri), dimorphism is pronounced, as males are entirely glossy black while females are uniform brown.[8] Juveniles across the family often possess duller plumage than adults, featuring streaking or pale fringes on the upperparts that fade with maturation, aiding in blending with forest understory. For instance, young Chabert's vangas show white shaft streaks and tips on the black head feathers, giving a paler, mottled look, and similar streaking on the back and wings.[21][22] In the red-shouldered vanga, juveniles have whitish underparts with brown-streaked upperparts and darker wing feathers.[23] Age-related and seasonal molts are documented in several species, though details remain poorly known for the family overall; these changes refine plumage contrast and vibrancy post-breeding. The helmet vanga (Euryceros prevostii) features unique casque-like head feathers forming a stiff, helmet-shaped crest of blue-black plumage, with minimal sexual variation but juveniles showing pale buff instead of black areas.[24] Molts typically involve replacing worn feathers to maintain camouflage efficacy in humid habitats, as seen in the blue vanga where remiges and coverts are renewed with olive-tinged edges.[17]Distribution and habitat
Geographic range
The Vangidae family exhibits a core geographic range centered in Madagascar, where all 15 species of the endemic radiation clade (subfamily Vanginae) occur exclusively, representing a remarkable example of adaptive diversification within the island's forests and woodlands.[5] These species occupy diverse regions across Madagascar, from lowland rainforests in the east to dry deciduous forests in the west and highlands in the central interior.[25] Beyond Madagascar, the family's distribution is scattered across Afro-Asian regions, with helmetshrikes (genus Prionops) found in sub-Saharan Africa, including the yellow-crested helmetshrike (Prionops alberti) restricted to montane forests in the eastern Democratic Republic of Congo near the Congo Basin.[25][26] In the Indomalayan realm, woodshrikes (genus Tephrodornis) inhabit scrub and open woodlands, such as the common woodshrike (Tephrodornis pondicerianus), which ranges from the Indian subcontinent through mainland Southeast Asia.[25][27] No vanga species are recorded as vagrants outside their established native ranges, reflecting their sedentary lifestyles.[25] Phylogenetic analyses trace the family's origins to Africa, with ancestral dispersals to Asia and Madagascar occurring approximately 25 million years ago, followed by range expansions and contractions influenced by Pleistocene climatic fluctuations that altered forest cover and connectivity across the island.[5][6] Fossil records of Malagasy avifauna from late Pleistocene deposits support patterns of habitat-driven distributional shifts during these periods of glacial-interglacial cycles.[28]Habitat preferences and ecology
Vangas of the family Vangidae primarily inhabit forested environments across Madagascar, with species adapted to both humid evergreen rainforests in the east and dry deciduous forests in the west.[29] Some species, such as the Tylas vanga (Tylas eduardi), also occur in mangroves and degraded forest fragments as small as 4 hectares, while others favor scrublands and coastal woodlands.[29] In Africa, related taxa like helmetshrikes (Prionops spp.) occupy savannas, open woodlands, and rainforests, extending the family's ecological breadth beyond Madagascar.[25] The family exhibits a broad altitudinal range from sea level to approximately 2,000 meters, with many species concentrated in lowland and mid-elevation zones.[29] For instance, the helmet vanga (Euryceros prevostii) is restricted to elevations below 800 meters in primary lowland rainforests of eastern Madagascar, occupying the middle stratum among large trees.[30] Microhabitat specialization is evident, as seen in the Xenopirostris vangas, which prefer dense understory layers in dry forests for foraging in dead wood and leaf litter.[31] Ecologically, vangas serve as key insectivores within Madagascar's forest food webs, controlling invertebrate populations through gleaning and probing behaviors.[6] Several species incorporate fruits into their diet, potentially aiding seed dispersal and indirect pollination in forest ecosystems.[5] The family shows high sensitivity to habitat loss, with Madagascar's forests declining by over 44% from 1953 to 2010 due to deforestation, severely impacting vanga populations reliant on intact woodlands.[32]Behavior and life history
Foraging and diet
Vangas exhibit an omnivorous diet dominated by invertebrates, primarily consisting of insects such as beetles, caterpillars, and orthopterans, along with spiders and other arthropods, while some species supplement this with fruits, nectar, small lizards, frogs, and occasionally bird eggs or nestlings.[25][11][14] For instance, the hook-billed vanga (Vanga curvirostris) preys on large insects and small vertebrates like chameleons and frogs, often dismembering larger items before consumption.[11] Foraging techniques vary across the family, reflecting specialized bill shapes that enable distinct methods such as gleaning, probing, and sallying, with most species active during daylight hours in forest canopies, midstories, or understories.[25][14] Gleaning, the most common approach, involves plucking prey from leaves, twigs, and branches; the blue vanga (Cyanolanius madagascariensis) exemplifies this by searching foliage clusters, sometimes hanging upside down to access hidden insects.[33][14] Probing is employed by species with elongated or curved bills, such as the sickle-billed vanga (Falculea palliata), which inserts its bill into bark crevices and dead wood to extract ants and grubs, akin to woodpecker-like behavior.[34][14] Sallying or hawking pursuits target flying insects; the rufous vanga (Schetba rufa) frequently launches short aerial chases from perches.[14] The nuthatch vanga (Hypositta corallirostris) primarily gleans prey from bark and foliage while climbing trunks and branches, occasionally probing into crevices.[14][7] Many vanga species forage in small groups or join mixed-species flocks to enhance detection of prey and predators, though some like the hook-billed vanga prefer solitary or paired hunting.[25] The white-headed vanga (Leptopterus viridis) often forages in groups of up to six individuals, using a mix of gleaning, snatching, and probing to capture invertebrates from bark and foliage.[35] These behaviors underscore the family's adaptive radiation, where bill morphology—detailed in physical descriptions—directly influences foraging efficiency.[14]Reproduction and nesting
Vangas typically breed during the rainy season in Madagascar, from October to February, which aligns with increased food availability to support reproduction.[25] This period allows pairs to time nesting with peak insect abundance, essential for provisioning nestlings. Most vanga species exhibit social monogamy, where breeding pairs form stable bonds and share parental duties, though cooperative breeding with helpers occurs in select species.[16][36] Nests are generally cup-shaped structures constructed from twigs, moss, rootlets, and other plant fibers, placed 2–5 m above ground in trees or shrubs for protection from ground predators.[25] Clutch sizes range from 2 to 4 eggs, with an average of 2–3 across observed species; for example, Chabert's vanga (Leptopterus chabert) lays 1–3 eggs per clutch.[37] Both parents incubate the eggs for 14–16 days, sharing duties roughly equally to maintain nest temperature.[36] Plumage patterns may play a role in courtship displays, signaling mate quality during pair formation.[25] Nestlings remain in the nest for 18–25 days before fledging, during which parents deliver frequent insect prey to the brood.[25] Cooperative breeding is uncommon in the family but documented in species like Bernier's vanga (Oriolia bernieri), where immature males assist with incubation and feeding, contributing up to 4% of incubation time and aiding in nest material delivery. In Chabert's vanga, groups of adults, including helpers, participate in feeding fledglings post-nesting, enhancing chick survival. Fledglings depend on adults for several weeks after leaving the nest, gradually becoming independent.[36]Vocalizations and social interactions
Vangas possess a diverse vocal repertoire that includes whistles, caws, rattles, and melodious songs, serving functions such as territory defense, mate attraction, and predator alerting.[12] For instance, the Sickle-billed Vanga (Falculea palliata) emits a characteristic loud "wa-aah" call resembling a crying infant, along with nasal "gaaa" contact calls and rapid "kekekeke" alarm notes.[34] The Madagascar Blue Vanga (Cyanolanius madagascariensis) produces an angry hard rattle as its primary call, often delivered from treetops, potentially functioning as a song for territorial purposes.[38] In contrast, the Hook-billed Vanga (Vanga curvirostris) delivers harsh, high-pitched whistles and raucous calls, while the Rufous Vanga (Schetba rufa) features echoing bell-like duets between paired males and females, highlighting pair-bonding communication.[39] These vocalizations vary across species but commonly include descending whistles in genera like Xenopirostris, such as the piercing "tseeang" of Van Dam's Vanga (Xenopirostris damii).[40] Socially, most vanga species are solitary or maintain stable pairs outside the breeding season, though many participate in mixed-species foraging flocks that enhance detection of food and threats.[41] Gregarious exceptions include the Sickle-billed Vanga and Chabert's Vanga (Leptopterus chabert), which form flocks of 6–32 individuals and engage in communal roosting.[39] The Rufous Vanga exhibits cooperative social structure, with family groups where young males assist in breeding efforts, traveling together year-round.[12] Communication plays a key role in these dynamics; alarm calls, such as those of the Rufous Vanga, rally mixed flocks for mobbing predators, while contact notes maintain cohesion during foraging.[12] Aggression is evident in territorial displays, including bill-clapping in the Hook-billed Vanga.[39] Overall, vocal and social behaviors reflect adaptations to Madagascar's forested environments, balancing individual territory maintenance with opportunistic group interactions.[41]Conservation
Threats and population trends
The primary threat to vanga populations is habitat loss driven by deforestation in Madagascar, where forest cover has been declining at an average annual rate of approximately 1-2% due to slash-and-burn agriculture, logging for timber and firewood, and expansion of subsistence farming.[42][43] This is particularly acute for forest-dependent vangas, as their specialized habitats in humid and dry forests are fragmented and degraded, reducing available breeding and foraging areas.[31] Additional pressures include hunting for bushmeat, which targets a wide range of bird species in Madagascar, including vangas, with studies documenting exploitation of 87 avian taxa across eight years of surveys.[44] Climate change exacerbates these issues by altering precipitation patterns, leading to drier conditions that shift suitable ranges and degrade forest ecosystems critical for vanga survival.[45] Pesticide use in expanding agricultural zones further threatens insectivorous vangas by diminishing prey availability, as these chemicals accumulate in food chains and affect arthropod populations. Population trends for many vanga species indicate ongoing declines, with forest-restricted taxa experiencing reductions of 20-50% over three generations due to cumulative habitat pressures.[46] For instance, Van Dam's vanga (Xenopirostris damii) has seen an estimated 23-35% population decrease over the past three generations (approximately 12 years), linked to accelerated deforestation in its narrow dry forest range, though total numbers remain between 1,500 and 7,000 mature individuals.[31] Overall, these trends underscore a broader vulnerability across the Vangidae family, with no species showing stable or increasing populations amid intensifying anthropogenic impacts.[30]Species status assessments
The Vangidae family encompasses 40 species across 21 genera, predominantly in Madagascar with others in Africa and Asia. According to the IUCN Red List assessments as of 2025, two species are classified as Endangered: the helmet vanga (Euryceros prevostii), uplisted from Vulnerable in 2018 due to projected severe impacts from climate change on its lowland rainforest habitat, and Bernier's vanga (Oriolia bernieri), which faces ongoing habitat destruction and fragmentation from subsistence agriculture, with climate models predicting the loss of its ecological niche by 2050.[30][46] Eight species are listed as Vulnerable, including Van Dam's vanga (Xenopirostris damii), downgraded from Endangered in 2025 following updated population estimates but still at risk from rapid dry forest loss exceeding 23% over three generations; Pollen's vanga (Xenopirostris polleni); and the red-shouldered vanga (Calicalicus rufocarpalis), assessed as Vulnerable since its formal description in 2017 based on its small population of 8,000–20,000 individuals confined to a fragmented area in southwestern Madagascar. The remaining species are categorized as Least Concern or Near Threatened.[31][47] Recent updates to the IUCN Red List highlight increasing pressures on vanga populations, particularly through habitat degradation. For instance, the nuthatch vanga (Hypositta corallirostris) was uplisted from Least Concern in 2016 to Near Threatened in 2025, reflecting a suspected decline of 20–29% over the past 10 years driven by forest cover loss, with projections of continued moderate declines of 15–25% over the next decade. These assessments underscore the vulnerability of Malagasy endemics, where habitat loss from agriculture and climate change disproportionately affects range-restricted species compared to their Afro-Asian counterparts, which face lower overall threat levels due to broader distributions and less intense deforestation pressures.[48][25]Conservation initiatives
Madagascar's conservation efforts for vanga species heavily rely on a network of protected areas, which encompass over 20 national parks and reserves covering approximately 10% of the island's remaining forest habitat.[49] Masoala National Park, the largest protected area in the country, safeguards critical habitats for species like the endangered helmet vanga (Euryceros prevostii), hosting about 50% of Madagascar's vertebrate diversity, including multiple vanga taxa.[30] Similarly, Ankarafantsika National Park, a UNESCO-recognized site and Ramsar wetland, supports vanga populations through its dry forest ecosystems and promotes habitat integrity via regulated access.[50] Reforestation initiatives complement these protections by restoring degraded vanga habitats, with national and international projects aiming to plant up to 60 million trees across Madagascar between 2021 and 2025 to combat deforestation.[51] The Madagascar Biodiversity Partnership, in collaboration with local communities, has already planted over 5 million native trees in key forested regions, enhancing connectivity for forest-dependent birds like various vanga species.[52] Research and monitoring programs are essential for tracking vanga populations and informing conservation strategies. BirdLife International conducts regular surveys and uses camera traps to monitor elusive species, such as Pollen's vanga (Xenopirostris polleni), in fragmented eastern forests, providing data on distribution and threats.[53] The African Bird Club's targeted projects, including those in Masoala, have updated population estimates and raised community awareness for helmet vanga conservation through field assessments and education.[49] Community-based ecotourism in areas like Ankarafantsika further supports monitoring by involving locals in bird surveys and habitat patrols, generating sustainable income while protecting vanga habitats.[50] On the international front, funding and agreements bolster these efforts, with no vanga species currently listed under CITES due to limited trade pressures, though broader avian protections apply. Recent initiatives include nearly $40 million from the Global Environment Facility in 2025 for climate-resilient landscapes in eastern Madagascar, focusing on forest corridors to aid bird migration and habitat linkage for species like the helmet vanga.[54] These projects, supported by organizations such as the Critical Ecosystem Partnership Fund, emphasize ecosystem-based adaptation to connect protected areas and mitigate climate impacts on vanga populations.[55]Species diversity
Overview of genera
The family Vangidae encompasses 21 genera distributed across Madagascar, Africa, and Asia, with the Malagasy radiation representing a classic example of adaptive diversification among passerine birds. Of these, 15 genera are endemic to Madagascar and collectively comprise 22 species, showcasing extraordinary variation in bill shapes adapted to diverse foraging niches, from hook-like structures for extracting insects to stout forms for probing foliage.[6][25] Notable Malagasy genera include Vanga, which is monotypic and features the hook-billed vanga (V. curvirostris) with its curved bill suited for gleaning arthropods; Calicalicus, a polytypic genus of shrike-vangas (four species) characterized by robust, hooked bills resembling those of true shrikes for capturing prey in flight; and Euryceros, encompassing two species of helmet vangas with massive, casque-like bills that facilitate specialized wood-boring behaviors.[6][5] The remaining six genera occur in continental Africa and Asia, totaling approximately 18 species, and exhibit more conservative morphologies often likened to shrikes or flycatchers, with distributions ranging from savannas to forests. Examples include Prionops (eight species of helmetshrikes in sub-Saharan Africa), known for their crested heads and cooperative foraging in groups, and Philentoma (two species of flycatcher-vangas in Southeast Asian forests), which display subtle sexual dimorphism and perch-gleaning habits akin to Old World flycatchers.[25][5] These Afro-Asian lineages form the basal clades of Vangidae, contrasting with the derived, hyper-diverse Malagasy assemblage that arose from a single colonization event.[6] Vangid genera vary in species richness, with several monotypic forms such as Oriolia (Bernier's vanga, O. bernieri), a secretive understory species with a finch-like bill, highlighting isolated evolutionary endpoints, while polytypic genera like Newtonia (four species of newtonias, all Malagasy endemics) demonstrate ongoing speciation in humid forest habitats.[6][5] The phylogenetic divergence among these genera spans approximately 5 to 25 million years, with the initial Malagasy crown radiation dating to the late Oligocene (around 23 million years ago) and subsequent bursts of diversification in the Miocene, driven by ecological opportunities in Madagascar's isolated biota.[6] This temporal framework underscores the family's role as a model for studying adaptive radiations in island systems.[5]List of species
The family Vangidae comprises 40 species, 22 of which are endemic to Madagascar, according to the IOC World Bird List (version 13.1, 2023), with the total remaining stable through subsequent updates as of 2025.[56] This list is organized alphabetically by genus and includes each species' common name, binomial nomenclature, a brief note on its primary range, and IUCN Red List status (as of 2023 assessments). Conservation statuses are cross-referenced from the IUCN for context, though detailed threats are addressed elsewhere.| Genus | Common Name | Binomial Name | Range Notes | IUCN Status |
|---|---|---|---|---|
| Artamella | White-headed Vanga | Artamella viridis | Endemic to Madagascar | Least Concern |
| Bias | Black-and-white Shrike-flycatcher | Bias musicus | Sub-Saharan Africa | Least Concern |
| Calicalicus | Red-tailed Vanga | Calicalicus rufus | Endemic to Madagascar | Near Threatened |
| Calicalicus | Chattering Vanga | Calicalicus analis | Endemic to Madagascar | Least Concern |
| Calicalicus | Red-shouldered Vanga | Calicalicus rufocarpalis | Endemic to Madagascar (described 2017) | Endangered |
| Calicalicus | Ashy Vanga | Calicalicus leucolophus | Endemic to Madagascar | Least Concern |
| Cyanolanius | Blue Vanga | Cyanolanius madagascarinus | Madagascar and Comoros Islands | Least Concern |
| Euryceros | Helmet Vanga | Euryceros prevostii | Endemic to Madagascar | Vulnerable |
| Falculea | Sickle-billed Vanga | Falculea palliata | Endemic to Madagascar | Least Concern |
| Harpyhymenaeus | Crossley's Vanga | Harpyhymenaeus crossleyi | Central Africa (Cameroon to Uganda) | Least Concern |
| Hemipus | Black-winged Flycatcher-shrike | Hemipus hirundinaceus | Southeast Asia (India to Indonesia) | Least Concern |
| Hemipus | Bar-winged Flycatcher-shrike | Hemipus picatus | Southeast Asia (Himalayas to Sumatra) | Least Concern |
| Hypositta | Nuthatch Vanga | Hypositta corallirostris | Endemic to Madagascar | Least Concern |
| Leptopterus | Chabert Vanga | Leptopterus chabert | Endemic to Madagascar | Least Concern |
| Megabyas | Shrike-tit | Megabyas flammulatus | New Guinea and nearby islands | Least Concern |
| Newtonia | Common Newtonia | Newtonia brunneicauda | Endemic to Madagascar | Least Concern |
| Newtonia | Dark Newtonia | Newtonia amphichroa | Endemic to Madagascar | Least Concern |
| Newtonia | Red-tailed Newtonia | Newtonia fanovanae | Endemic to Madagascar | Vulnerable |
| Newtonia | Archbold's Newtonia | Newtonia archboldi | Endemic to Madagascar | Endangered |
| Oriolia | Bernier's Vanga | Oriolia bernieri | Endemic to Madagascar | Endangered |
| Philentoma | Rufous-winged Philentoma | Philentoma pyrhoptera | Southeast Asia (Malaysia to Indonesia) | Least Concern |
| Philentoma | Chestnut-sided Philentoma | Philentoma velata | Southeast Asia (Thailand to Borneo) | Least Concern |
| Prionops | White Helmetshrike | Prionops plumosus | West and central Africa | Least Concern |
| Prionops | Gabela Helmetshrike | Prionops gabela | Endemic to Angola | Endangered |
| Prionops | Grey-crested Helmetshrike | Prionops poliolophus | Central Africa | Least Concern |
| Prionops | Rufous-bellied Helmetshrike | Prionops rufiventris | West and central Africa | Least Concern |
| Prionops | White-crested Helmetshrike | Prionops plumatus | Sub-Saharan Africa | Least Concern |
| Prionops | Red-billed Helmetshrike | Prionops caniceps | West Africa | Least Concern |
| Prionops | Retz's Helmetshrike | Prionops retzii | Sub-Saharan Africa | Least Concern |
| Prionops | Yellow-crested Helmetshrike | Prionops alberti | Central Africa (DRC) | Vulnerable |
| Prionops | Black-crested Helmetshrike | Prionops cristatus | East Africa | Least Concern |
| Schetba | Rufous Vanga | Schetba rufa | Endemic to Madagascar | Near Threatened |
| Tephrodornis | Common Woodshrike | Tephrodornis pondicerianus | Indian subcontinent to Southeast Asia | Least Concern |
| Tephrodornis | Large Woodshrike | Tephrodornis virgatus | Southeast Asia (Myanmar to Philippines) | Least Concern |
| Tephrodornis | Malabar Woodshrike | Tephrodornis affinis | Western Ghats, India | Least Concern |
| Tephrodornis | Sulawesi Woodshrike | Tephrodornis sulaensis | Endemic to Sulawesi | Least Concern |
| Tylas | Tylas Vanga | Tylas eduardi | Endemic to Madagascar | Vulnerable |
| Vanga | Hook-billed Vanga | Vanga curvirostris | Endemic to Madagascar | Least Concern |
| Xenopirostris | Lafresnaye's Vanga | Xenopirostris xenopirostris | Endemic to Madagascar | Vulnerable |
| Xenopirostris | Pollen's Vanga | Xenopirostris polleni | Endemic to Madagascar | Vulnerable |
| Xenopirostris | Van Dam's Vanga | Xenopirostris damii | Endemic to Madagascar | Endangered |
