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Cotinga
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| Cotingas | |
|---|---|
| Spangled cotinga (Cotinga cayana) | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Passeriformes |
| Parvorder: | Tyrannida |
| Family: | Cotingidae Bonaparte, 1849 |
| Genera | |
|
Many, see text | |
| Geographical range of the cotingas. | |
The cotingas are a large family, Cotingidae, of suboscine passerine birds found in Central America and tropical South America. Cotingas are birds of forests or forest edges, that are primary frugivorous. They all have broad bills with hooked tips, rounded wings, and strong legs. They range in size from 12–13 cm (4.7–5.1 in) of the fiery-throated fruiteater (Pipreola chlorolepidota) up to 48–51 cm (19–20 in) of the Amazonian umbrellabird (Cephalopterus ornatus).[1][2]
Description
[edit]Cotingas vary widely in social structure. There is a roughly 50/50 divide in the family between species with biparental care, and those in which the males play no part in raising the young.[3] The purple-throated fruitcrow lives in mixed-sex groups in which one female lays an egg and the others help provide insects to the chick.[4]
In cotinga species where only the females care for the eggs and young, the males have striking courtship displays, often grouped together in leks. Such sexual selection results in the males of these species, including the Guianan cock-of-the-rock, being brightly coloured, or decorated with plumes or wattles, like the umbrellabirds, with their umbrella-like crest and long throat wattles. Other lekking cotingids like the bellbirds and screaming piha, have distinctive and far-carrying calls. In such canopy-dwelling genera as Carpodectes, Cotinga, and Xipholena, males gather high in a single tree or in adjacent trees, but male cocks-of-the-rock, as befits their more terrestrial lives, give their elaborate displays in leks on the ground.[4]
The females of both lekking and biparental species are duller than the males.
Breeding
[edit]Nests range from tiny to very large. Many species lay a single egg in a nest so flimsy that the egg can be seen from underneath. This may make the nests hard for predators to find. Fruiteaters build more solid cup nests, and the cocks-of-the-rock attach their mud nests to cliffs.[4] The nests may be open cups or little platforms with loosely woven plant material, usually placed in a tree. The clutches comprise one to four eggs. Incubation typically takes 15–28 days. Fledging usually occurs at 28–33 days.
Habitat
[edit]Deserts, open woodlands, coastal mangroves, and humid tropical forests comprise their habitats. Cotingas face very serious threats from the loss of their habitats.[5]
Taxonomy and systematics
[edit]The family Cotingidae was introduced by French naturalist Charles Lucien Bonaparte in 1849.[6] According to the International Ornithological Committee, as of July 2021, the family contains 66 species divided into 24 genera.[7]
A 2014 molecular phylogenetic study of the cotingas by Jacob Berv and Richard Prum found that the genera formed five monophyletic clades and they proposed that the family could be divided into five subfamilies.[8] The following cladogram is based on a molecular phylogenetic study of the suboscines by Michael Harvey and collaborators published in 2020.[9]
| Cotingidae |
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The genus Tijuca was found to be embedded in Lipaugus, a position that was confirmed by a more detailed 2020 study.[10]
| Image | Genus | Living species |
|---|---|---|
| Ampelioides Verreaux, 1867 |
| |
| Pipreola Swainson, 1838 |
| |
| Snowornis Prum, 2001 |
| |
| Carpornis G.R. Gray, 1846 |
| |
| Rupicola Brisson, 1760 |
| |
| Phoenicircus Swainson, 1832 |
| |
| Zaratornis Koepcke, 1954 |
| |
| Phytotoma Molina, 1782 |
| |
| Phibalura Vieillot, 1816 |
| |
| Doliornis Taczanowski, 1874 |
| |
| Ampelion Tschudi, 1845 |
| |
| Haematoderus Bonaparte, 1854 |
| |
| Querula Vieillot, 1816 |
| |
| Pyroderus G.R. Gray, 1840 |
| |
| Cephalopterus E. Geoffroy Saint-Hilaire, 1809 |
| |
| Perissocephalus Oberholser, 1899 |
| |
| Lipaugus F. Boie, 1828 |
| |
| Procnias Illiger, 1811 |
| |
| Cotinga Brisson, 1760 |
| |
| Porphyrolaema Bonaparte, 1854 |
| |
| Conioptilon Lowery & O'Neill, 1966 |
| |
| Gymnoderus E. Geoffroy Saint-Hilaire, 1809 |
| |
| Xipholena Gloger, 1841 |
| |
| Carpodectes Salvin, 1865 |
|
A number of species previously placed in this family are now placed in the family Tityridae (genera Laniisoma, Laniocera and Iodopleura)[11]
References
[edit]- ^ Snow, D.; Sharpe, C.J. (2018). del Hoyo, J.; Elliott, A.; Sargatal, J.; Christie, D.A.; de Juana, E. (eds.). "Fiery-throated Fruiteater (Pipreola chlorolepidota)". Handbook of the Birds of the World Alive. Lynx Edicions. doi:10.2173/bow.fitfru1.01. S2CID 243289215. Retrieved 30 June 2018.
- ^ Snow, D. (2018). del Hoyo, J.; Elliott, A.; Sargatal, J.; Christie, D.A.; de Juana, E. (eds.). "Amazonian Umbrellabird (Cephalopterus ornatus)". Handbook of the Birds of the World Alive. Lynx Edicions. doi:10.2173/bow.amaumb1.01. S2CID 216264434. Retrieved 30 June 2018.
- ^ Cockburn, Andrew (2006). "Prevalence of different modes of parental care in birds". Proceedings of the Royal Society B: Biological Sciences. 273 (1592): 1375–1383. doi:10.1098/rspb.2005.3458. PMC 1560291. PMID 16777726. Supplementary Material.
- ^ a b c Prum, Richard O.; Snow, David W. (2003). "Cotingas". In Christopher Perrins (ed.). Firefly Encyclopedia of Birds. Firefly Books. pp. 432–433. ISBN 1-55297-777-3.
- ^ Complete Birds of the World. National Geographic. p. 200.
- ^ Bock, Walter J. (1994). History and Nomenclature of Avian Family-Group Names. Bulletin of the American Museum of Natural History. Vol. 222. New York: American Museum of Natural History. p. 149. hdl:2246/830.
- ^ Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (July 2021). "Cotingas, manakins, tityras, becards". IOC World Bird List Version 11.2. International Ornithologists' Union. Retrieved 7 December 2021.
- ^ Berv, J.S.; Prum, R.O. (2014). "A comprehensive multilocus phylogeny of the Neotropical cotingas (Cotingidae, Aves) with a comparative evolutionary analysis of breeding system and plumage dimorphism and a revised phylogenetic classification". Molecular Phylogenetics and Evolution. 81: 120–136. doi:10.1016/j.ympev.2014.09.001. PMID 25234241.
- ^ Harvey, M.G.; Bravo, G.A.; Claramunt, S.; Cuervo, A.M.; Derryberry, G.E.; Battilana, J.; Seeholzer, G.F.; McKay, J.S.; O'Meara, B.C.; Faircloth, B.C.; Edwards, S.V.; Pérez-Emán, J.; Moyle, R.G.; Sheldon, F.H.; Aleixo, A.; Smith, B.T.; Chesser, R.T.; Silveira, L.F.; Cracraft, J.; Brumfield, R.T.; Derryberry, E.P. (2020). "The evolution of a tropical biodiversity hotspot". Science. 370 (6522): 1343–1348. Bibcode:2020Sci...370.1343H. doi:10.1126/science.aaz6970. hdl:10138/329703. PMID 33303617. S2CID 228084618. A high resolution version of the phylogenetic tree in Figure 1 is available from the first author's website here.
- ^ Settlecowski, A.E.; Cuervo, A.M.; Tello, J.G.; Harvey, M.G.; Brumfield, R.T.; Derryberry, E.P. (2020). "Investigating the utility of traditional and genomic multilocus datasets to resolve relationships in Lipaugus and Tijuca (Cotingidae)". Molecular Phylogenetics and Evolution. 147 106779. doi:10.1016/j.ympev.2020.106779. PMID 32135309. S2CID 212568712.
- ^ Remsen, J. V. Jr., C. D. Cadena, A. Jaramillo, M. Nores, J. F. Pacheco, M. B. Robbins, T. S. Schulenberg, F. G. Stiles, D. F. Stotz, & K. J. Zimmer. 2007. A classification of the bird species of South America. Archived March 2, 2009, at the Wayback Machine American Ornithologists' Union. Accessed 12 December 2007.
Further reading
[edit]- Snow, D.W. (1976). "The relationship between climate and annual cycles in the Cotingidae." Ibis 118(3):366-401
- Snow, D.W. (1982). The Cotingas: Bellbirds, Umbrella birds and their allies. British Museum Press. ISBN 0-19-858511-X
External links
[edit]- Cotinga videos on the Internet Bird Collection
Cotinga
View on GrokipediaTaxonomy and Systematics
Etymology and History
The genus name Cotinga originates from the Old Tupi word cutinga, spoken by the indigenous Tupi people of Brazil, entering European scientific nomenclature via French cotinga and New Latin.[7] This derivation reflects the birds' prominence in the tropical forests where Tupi communities lived, though the precise semantic meaning remains tied to indigenous descriptions of local avifauna.[8] The genus Cotinga was formally introduced by French zoologist Mathurin Jacques Brisson in his 1760 work Ornithologie, encompassing several Neotropical species based on specimens from South America.[9] Brisson's classification drew from earlier collections, but initial species descriptions within the genus built on explorations by 19th-century naturalists; for instance, Austrian collector Johann Natterer gathered key specimens during his expeditions in Brazil from 1817 to 1835, while British ornithologist John Gould described additional forms like Cotinga nattereri (now synonymous) in the 1850s based on museum materials.[10] These efforts highlighted the genus's distinct frugivorous traits amid the era's growing catalog of New World birds. Early taxonomic history was marked by confusions, as Linnaeus in 1766 reassigned Brisson's Cotinga species primarily to the genus Ampelis (waxwings) or Lanius (shrikes), reflecting limited understanding of suboscine passerines.[10] By 1825, William Swainson proposed broader groupings for Neotropical oscines in his On the Natural History and Classification of Birds, tentatively linking cotingas to fruit-eating forms but without a dedicated family.[11] The pivotal revision came in 1849 when Charles Lucien Bonaparte established the family Cotingidae, explicitly including Cotinga and separating it from manakins (Pipridae) and tyrant flycatchers (Tyrannidae), based on shared morphological features like broad bills and zygodactyl feet.[12] Through the late 19th and 20th centuries, classifications evolved with improved systematics; for example, Robert Ridgway's 1907 Birds of North and Middle America refined Cotingidae boundaries, incorporating Cotinga as a core genus while resolving lingering affinities with flycatcher-like groups through comparative anatomy.[13] By the mid-20th century, works like Alexander Wetmore's 1960 contributions to the Check-list of North American Birds solidified the family's monophyly, setting the stage for molecular analyses, though pre-DNA revisions emphasized ecological parallels in frugivory over strict phylogeny.[14]Species List
The genus Cotinga includes seven extant species, all of which are monotypic with no recognized subspecies.[3] Each species was originally described in the 18th or 19th century, primarily based on specimens from tropical regions of Central and South America. The following list details each species, including the original description date and author, type locality, and brief distinctive field marks for identification in the field.- Lovely Cotinga (Cotinga amabilis): Originally described by Gould in 1857, with the type locality restricted to Verapaz, Guatemala.[15] Males are characterized by deep purplish-blue plumage overall, with a glossy violet throat and upper breast, and blackish wings and tail; females are duller brownish with pale underparts and fine barring.[16]
- Turquoise Cotinga (Cotinga ridgwayi): Described by Ridgway in 1887, with the type locality at Pozo Azul, Costa Rica.[17] Males exhibit striking turquoise-blue plumage with a purple throat and lower belly, black wings, and a square tail; females are pale grayish-brown with heavy black spotting below and white spots on the crown.[18]
- Blue Cotinga (Cotinga nattererii): Originally described as Rupicola nattererii by Boissonneau in 1840 (later placed in Cotinga by Sclater in 1855), with the type locality near Bogotá, Colombia.[19] Males are uniformly brilliant turquoise-blue with a purplish throat and black primaries; females are dark brown overall with paler underparts and faint scaling.
- Plum-throated Cotinga (Cotinga maynana): Described by Gould in 1855 (based on Linnaeus's 1766 Ampelis maynana), with the type locality in the Mayna region, Peru.[20] Males show uniform sky-blue plumage with a deep purple throat and minimal black on the wings; females are buffy brown with indistinct scalloping on the underparts and a pale supercilium.[21]
- Purple-breasted Cotinga (Cotinga cotinga): Originally described as Ampelis cotinga by Linnaeus in 1766, with the type locality restricted to the vicinity of Belém, Pará, Brazil.[22] Males feature deep blue upperparts, a broad purple breast and belly, and blackish flight feathers; females are brownish with pale barring below and a yellowish orbital ring.[23]
- Spangled Cotinga (Cotinga cayana): Described as Ampelis cayana by Linnaeus in 1766, with the type locality at Cayenne, French Guiana (specimens also from Brazil).[24] Males display lavender-blue plumage with black-spangled white spots on the wings and a purple throat; females are olive-brown above with yellow underparts and dark scaling.
- Banded Cotinga (Cotinga maculata): Originally described as Ampelis maculata by Statius Müller in 1776, with the type locality restricted to Rio de Janeiro, Brazil.[25] Males are notable for their bright blue head and underparts, purple throat, and unique black banding across the white-spangled wings and tail; females are plain brown with subtle pale fringes.
Phylogenetic Relationships
The genus Cotinga occupies a central position within the core cotinga clade of the family Cotingidae, as resolved by multilocus phylogenetic analyses incorporating nuclear and mitochondrial DNA sequences from multiple loci. This placement situates Cotinga in the subfamily Cotinginae, where it forms part of a diverse group of frugivorous and omnivorous taxa, with close affinities to genera such as Procnias and Porphyrolaema, and broader relationships to montane forms like Pipreola and Ampelion in adjacent subfamilies.[12] A comprehensive study using approximately 7,500 base pairs from six genes across 61 cotinga species confirmed the monophyly of Cotingidae and proposed a revised classification into five subfamilies—Pipreolinae, Rupicolinae, Phytotominae, Cephalopterinae, and Cotinginae—based on robust Bayesian and maximum likelihood inferences, with Cotinga firmly embedded in the latter.[12] Molecular evidence from both mitochondrial (e.g., cytochrome b and ND2) and nuclear (e.g., myoglobin intron 2, G3PDH, RAG-1, RAG-2) markers indicates that the divergence of the core cotinga lineages, including Cotinga, occurred during the early Miocene, approximately 20–25 million years ago, following the initial radiation of the family around 31 million years ago in the late Oligocene.[12] This timeline aligns with geological evidence of Neotropical forest expansion and vicariance events that facilitated diversification among suboscine passerines. No specific fossil records attributable to the genus Cotinga are known, and the family's paleontological evidence remains sparse, limited to indeterminate Miocene remains suggestive of early cotingid-like forms in South American deposits.[12] Within the genus Cotinga, phylogenetic relationships reveal a monophyletic assemblage with a basal split separating the plum-throated cotinga (C. maynana) and spangled cotinga (C. cayana) as successive sisters to a derived clade comprising the remaining species. The latter group further divides into subclades, including a lineage of Central American taxa such as the lovely cotinga (C. amabilis), which is sister to a clade in which the blue cotinga (C. nattererii) and turquoise cotinga (C. ridgwayi) are sisters to the banded cotinga (C. maculata) and purple-breasted cotinga (C. cotinga).[12] This pattern reflects biogeographic partitioning between Central and South American populations, driven by historical barriers like the Andes and Amazonian lowlands, though no extinct species have been identified in the fossil record to inform deeper evolutionary history.[12]Physical Characteristics
Morphology and Size
Cotingas of the genus Cotinga are medium-sized passerines, with body lengths typically ranging from 18 to 22 cm and weights between 50 and 90 g across species.[26] The Lovely Cotinga (C. amabilis) represents the smaller end of this spectrum at approximately 18–20 cm in length and 66–75 g, while the Banded Cotinga (C. maculata) is the largest at 19–22 cm and around 65 g.[27][28] These dimensions place them in the mid-range for the Cotingidae family, facilitating agile movement through dense forest canopies.[29] Key morphological features include a broad, hooked bill adapted for consuming fruit, rounded wings that enable precise, maneuverable flight in forested environments, and strong legs with anisodactyl feet suited for perching on branches.[26] The bill's wide, slightly curved structure aids in gripping and manipulating soft fruits, while the rounded wing shape supports short bursts of flight between perches.[26] Sexual size dimorphism is minimal within the genus, though males tend to be slightly larger than females in certain species. This subtle variation contrasts with the more pronounced plumage dimorphism but aligns with the overall structural uniformity that supports their arboreal lifestyle.[12]Plumage and Sexual Dimorphism
Species in the genus Cotinga exhibit pronounced sexual dimorphism in plumage, with males displaying vibrant structural colors derived from photonic nanostructures in feather barbs, while females possess cryptic pigmentation for camouflage.[12] Males are typically adorned in iridescent blues, purples, and blacks, a coloration unique within the Cotingidae family.[23] For instance, the Blue Cotinga (C. nattererii) male is uniformly brilliant turquoise-blue overall.[30] In contrast, the Purple-breasted Cotinga (C. cotinga) male features a striking blue body with an extensive purple patch from throat to mid-belly and black wings and tail.[23] The Turquoise Cotinga (C. ridgwayi) male shows metallic blue plumage accented by a purple throat and lower belly, with blackish wings and tail.[31] Females lack these vivid hues, instead exhibiting dull olive-green to brown upperparts with subtle streaking or scaling on the underparts for concealment in forest canopies.[23] The Blue Cotinga female is dark brown overall, while the Banded Cotinga (C. maculata) female is dusky brown above with white underparts.[30][32] The Plum-throated Cotinga (C. maynana) female appears buffy tan below with faint scalloping.[21] Distinctive patterns further characterize some species, such as the black spangling on the turquoise-blue back and wings of the Spangled Cotinga (C. cayana) male, and the blue breast band contrasting purple underparts in the Banded Cotinga male.[33][34] Juveniles generally resemble adult females in coloration but with softer, less defined feather edges.[35] All Cotinga species undergo an annual prebasic molt, typically timed to coincide with periods of food abundance outside the peak breeding season.[36]Distribution and Habitat
Geographic Range
The genus Cotinga is distributed throughout the Neotropics, ranging from southern Mexico southward through Central America and much of tropical South America to northern Bolivia and southeastern Brazil. The core of their distribution lies in the Amazon Basin and the Atlantic Forest of eastern Brazil, where multiple species overlap in humid lowland forests. This Neotropical range reflects the genus's adaptation to tropical environments, with no species occurring outside the Americas.[29][37] Several species exhibit regional endemism within this broad distribution. The Lovely Cotinga (C. amabilis) and Turquoise Cotinga (C. ridgwayi) are Central American endemics, with the former occurring along the Atlantic slope from southeastern Mexico to western Panama, and the latter restricted to Costa Rica and extreme western Panama. In contrast, widespread Amazonian species include the Blue Cotinga (C. nattererii), found from central Panama through western Colombia, northwestern Ecuador, and western Venezuela; the Plum-throated Cotinga (C. maynana), distributed across the central and western Amazon Basin in southern Colombia, eastern Ecuador, eastern Peru, northern Bolivia, and western Brazil; the Spangled Cotinga (C. cayana), spanning the entire Amazon Basin from Colombia and Venezuela eastward to the Guianas and Brazil; and the Purple-breasted Cotinga (C. cotinga), primarily in northeastern South America including eastern Colombia, southern and eastern Venezuela, the Guianas, northern Peru, and northern Brazil. The Banded Cotinga (C. maculata) is endemic to the Atlantic Forest of southeastern Brazil.[38][39][31][40][41][42][33][43][44][45][46] Species of Cotinga typically occupy elevations from sea level to 1,500 m, with most records in lowland forests below 1,000 m; for example, the Lovely Cotinga reaches up to 1,700 m in Costa Rica, while the Blue Cotinga is generally below 900 m. The genus is largely non-migratory, with populations sedentary within their ranges, though some local movements may occur in response to fruit availability in the canopy. Historical range contractions have occurred due to deforestation, particularly in the Atlantic Forest where the Banded Cotinga has seen its distribution fragment and retract since the early 20th century.[38][47][29][32]Habitat Preferences
Cotingas primarily inhabit humid tropical forests across lowland and montane regions, favoring the canopy and edges of rainforests where dense vegetation provides ample cover and fruit resources.[1] They avoid arid environments and heavily disturbed areas, showing a strong preference for moist, intact ecosystems that support their frugivorous lifestyle.[1] Within these forests, cotingas occupy the upper canopy and mid-story layers, often perching in the crowns of tall trees to access fruiting structures. Smaller species, such as the blue cotinga (Cotinga nattererii) and spangled cotinga (C. cayana), specialize in the highest strata, while larger ones may utilize slightly lower levels.[48] For instance, the banded cotinga (C. maculata) is closely associated with the lowland Atlantic Forest of southeastern Brazil, where it forages in fruit-dominated canopies featuring trees like Ficus species.[49] Most cotinga species require old-growth forests and exhibit low tolerance for habitat degradation, with populations highly sensitive to fragmentation from logging and agriculture.[1] However, some, like the spangled cotinga, demonstrate limited adaptability to well-developed secondary growth near watercourses, though primary forest remains essential for their persistence.[33] Cotingas rely on the phenology of fruit availability, which influences their local movements within habitats; during periods of scarcity in forest interiors, such as dry seasons, individuals may shift toward edges where fruit production persists longer.[50] This pattern underscores their dependence on seasonal rhythms in tropical flora, though specific data for the genus remain limited compared to broader cotinga studies.[50]Behavior and Ecology
Diet and Foraging
Cotingas of the genus Cotinga are predominantly frugivorous, with fruits constituting the vast majority of their diet, often exceeding 80% based on observations of closely related cotingid species.[51] Their preferred foods include small berries and fruits from a variety of tropical trees and epiphytes, such as palms (Euterpe spp.), mistletoes (Psittacanthus spp.), Schefflera, and Hyeronima, which provide essential energy and nutrients.[52] Opportunistic insectivory supplements this diet, with insects like wasps and beetles consumed for protein, typically comprising less than 15% of intake in adults.[51] For instance, the purple-breasted cotinga (C. cotinga) is considered an obligate frugivore, relying exclusively on fruits such as those from palms and mistletoes.[52] Foraging occurs primarily in the forest canopy, where individuals or small groups perch quietly on exposed branches before actively seeking food. They employ a range of techniques, including gleaning fruits directly from foliage, reaching to pluck them from twigs, and brief hovering flights to access hanging berries, adaptations facilitated by their broad, hooked bills designed for efficient pulp extraction.[53] Insect foraging involves sally-strikes, where birds launch short aerial pursuits up to 10 meters to capture prey.[53] These behaviors are typically solitary or in loose pairs, minimizing competition in the upper strata of humid tropical forests. Dietary composition can shift seasonally, with an increased reliance on insects during breeding periods to meet higher protein demands, as observed in related cotingas where nestling diets include up to 38% arthropods.[51] Across the genus, cotingas consume dozens of fruit species annually, contributing significantly to seed dispersal by ingesting and defecating viable seeds away from parent plants, thus supporting forest regeneration without impacting agricultural crops.[50][54]Breeding Biology
Breeding in the genus Cotinga is poorly known, with detailed observations available for only a few species due to their canopy-dwelling habits and elusive nature.[33] The timing varies by region and species, but records suggest peaks aligned with local fruit availability; for example, in French Guiana, the Spangled Cotinga (C. cayana) breeds during the dry season, with a nest observed in October.[55] In the Amazon basin, family-wide patterns indicate breeding often begins early in the rainy season, around November, when brood patches are most common.[36] Clutch sizes are typically small, usually one egg, consistent with the frugivorous diet and slow life history of cotingas.[12] Nests are open cup-shaped structures built primarily by the female, using materials such as moss, small sticks, and plant fibers, and placed high in the canopy. In the Spangled Cotinga, a nest was situated approximately 12 m above ground in a fork of a yellow mombin tree (Spondias mombin).[55] For the Blue Cotinga (C. nattereri), a nest was recorded 28 m up in a sandbox tree (Hura crepitans) in Panama and reused the following year.[30] Incubation is performed solely by the female, with periods reported as long for the family, around 25 days in some cotingas.[56] Parental care is predominantly female-only in the genus, reflecting the polygynous mating system where males focus on lek displays rather than provisioning. In the Spangled Cotinga, the female fed the nestling 6–8 times per day with fruit, from dawn to dusk, and brooded it overnight; no male involvement was observed.[55] Nestlings remain in the nest for 15–30 days before fledging, developing slowly due to a diet heavy in fruit.[55] Breeding success is generally low, limited by high predation rates in the exposed canopy nests and the species' reliance on abundant fruit resources.[12]Vocalizations and Social Displays
Species of the genus Cotinga are generally poorly vocal, producing simple calls and mechanical sounds rather than complex songs or loud vocalizations. Vocalizations are limited and serve primarily for advertisement and interactions, often from high perches in the canopy. For example, the Spangled Cotinga (C. cayana) gives a soft, medium-pitched "hooo" call, repeated 2–3 times, and produces faint whistling noises with modified wing feathers during flight, which become louder in display contexts.[33] The Turquoise Cotinga (C. ridgwayi) emits pure-tone, high-frequency (7.3 kHz) metallic calls lasting about 0.6 seconds during advertisement or conspecific interactions.[57] Vocal activity peaks at dawn and dusk, with low-frequency components aiding propagation through dense foliage, though details remain scarce for most species in the genus, such as the Banded, Blue, Lovely, Plum-throated, and Purple-breasted cotingas.[58] Social displays typically involve males aggregating in loose leks or performing elaborate aerial courtship flights above the forest canopy to attract females, with minimal post-copulatory pair bonds and no cooperative breeding. These displays highlight the males' vibrant plumage and may incorporate mechanical wing sounds. Outside the breeding season, individuals are largely solitary or form loose foraging groups, maintaining territorial presence through occasional calling.[59]Conservation
Threats and Population Status
Of the seven species in the genus Cotinga, two are classified as threatened on the IUCN Red List, highlighting varying levels of endangerment across the group. The banded cotinga (C. maculata) is listed as Critically Endangered due to its extremely small and fragmented population, estimated at 50–249 mature individuals, while the turquoise cotinga (C. ridgwayi) is Vulnerable with a population of 1,250–2,820 mature individuals.[49][60] The remaining five species—blue (C. nattererii), lovely (C. amabilis), plum-throated (C. maynana), purple-breasted (C. cotinga), and spangled (C. cayana) cotingas—are categorized as Least Concern, though all exhibit suspected population declines driven by habitat pressures.[61][62][42][45][43] The primary threat to Cotinga species is habitat loss through deforestation, particularly in their tropical forest ranges. In the Amazon Basin, where most species occur, approximately 17% of the forest cover was lost between 2001 and 2020, primarily due to agricultural expansion, logging, and infrastructure development.[63] For the banded cotinga, endemic to Brazil's Atlantic Forest, ongoing fragmentation has led to an inferred population decline of 20–29% over three generations (13.8 years), with possible extirpation from parts of its range since the 1990s.[49] Illegal capture for the cage-bird trade exacerbates risks for vulnerable species like the banded cotinga, further isolating small populations in remnant forest patches.[49] Overall population estimates for the genus range from tens of thousands to potentially over 500,000 individuals, dominated by the more widespread blue cotinga (50,000–499,999 mature individuals), but fragmented distributions heighten extinction risks for all species.[61] Climate change poses an emerging threat by potentially disrupting fruit phenology, the primary food source for these frugivorous birds, though direct impacts on Cotinga remain understudied.[64] Recent assessments indicate no major population recoveries, with ongoing declines particularly evident among Atlantic Forest endemics like the banded cotinga, where habitat specialists show reduced detectability and representation in surveys.[65] For the purple-breasted cotinga, tree cover within its range declined by 5.9% over the past decade, correlating with a suspected 5–9% population decrease.[45] The turquoise cotinga has similarly declined by 1–19% over three generations (11.1 years), with local disappearances reported in Panama since 2013.[60]Conservation Measures
Conservation efforts for the genus Cotinga emphasize habitat protection and restoration, particularly in the Atlantic Forest of Brazil, where species such as the Banded Cotinga (C. maculata) face severe threats from deforestation. Key actions include the expansion of private reserves like Mata do Passarinho, which now spans over 1,500 acres and safeguards critical lowland forest fragments essential for the Banded Cotinga.[66] Additionally, habitat restoration initiatives in the Atlantic Forest aim to reconnect fragmented areas, with ongoing reforestation projects supporting the recovery of canopy-dependent species across the genus.[67] The Banded Cotinga benefits from protections in Serra do Mar reserves, including RPPN Estação Veracel and Reserva Serra Bonita, which serve as vital refuges through enforced anti-logging measures and biodiversity monitoring.[49] Internationally, the banded cotinga (C. maculata) is regulated under CITES Appendix I to control international trade in specimens.[68] BirdLife International supports monitoring programs through species factsheets that recommend systematic population assessments and habitat tracking, with efforts initiated around 2010 to evaluate trends in Amazonian and Atlantic Forest populations.[49] These programs integrate data from partner organizations to prioritize sites for intervention. Research initiatives focus on population tracking and ecological studies, utilizing methods such as observation towers and habitat surveys to estimate densities and movements. For instance, studies in Brazil's Atlantic Forest propose expanded monitoring of fruit availability and canopy use to inform supplementation strategies, though specific trials remain limited.[49] In the Amazon, acoustic surveys and point counts have been employed to document occurrences of species like the Plum-throated Cotinga (C. maynana), aiding in baseline data collection for long-term trends.[69] Successes include stable populations of Amazonian Cotinga species within large protected areas, such as Manu National Park in Peru, where the Plum-throated Cotinga persists due to the park's comprehensive anti-poaching and habitat management since its establishment in 1973.[70] Community-based ecotourism in Brazilian Atlantic Forest reserves, including guided birdwatching at sites like Reserva Serra Bonita, generates revenue for local protection while raising awareness, contributing to the maintenance of viable populations for species like the Banded Cotinga.[71]References
- https://en.wiktionary.org/wiki/cotinga
- https://species.wikimedia.org/wiki/Cotinga_ridgwayi
- https://species.wikimedia.org/wiki/Cotinga_maynana
- https://species.wikimedia.org/wiki/Cotinga_cotinga
- https://species.wikimedia.org/wiki/Cotinga_cayana
- https://species.wikimedia.org/wiki/Cotinga_maculata
