Wedge-billed woodcreeper
Wedge-billed woodcreeper
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Wedge-billed woodcreeper

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Wedge-billed woodcreeper

The wedge-billed woodcreeper (Glyphorynchus spirurus) is a sub-oscine passerine bird in subfamily Dendrocolaptinae of the ovenbird family Furnariidae. It is found in Mexico, Central America, Brazil, Bolivia, Ecuador, French Guiana, Guyana, Peru, Suriname, and Venezuela.

The wedge-billed woodcreeper is the only member of its genus. It has these 13 subspecies that are sorted into three groups and a species by the Clements taxonomy:

"pectoralis" group

"spirurus" group

"albigularis"

"cuneatus" group

The groups differ vocally; that and plumage and genetic differences among the subspecies suggest that the wedge-billed woodcreeper is actually more than one species.

The wedge-billed woodcreeper is the smallest woodcreeper, with a short, upturned, wedge-shaped bill resembling those of the three members of genus Xenops. It is 13 to 16 cm (5.1 to 6.3 in) long and weighs 10.5 to 21 g (0.37 to 0.74 oz). The sexes are alike. The nominate subspecies G. s. spirurus has a grayish forehead, a rich brown to russet-brown crown and nape, light buff lores, a thin buff to buff-white supercilium, a buff eyering, sooty-brown auriculars, and a brown malar stripe. Its upper back and scapulars are rich brown to russet-brown, and its lower back, uppertail coverts, and tail are cinnamon-rufous to rufous-chestnut. Its wing coverts are russet, its inner secondaries rufous, and its other secondaries and its primaries dark brown with blackish tips. The underside of most wing feathers have a stripe of buff to buff-white that shows as a band in flight. The sides of its neck are brown with small buff spots and its throat is whitish buff to buff with some dusky spots. Its underparts are olive-brown to russet-brown, its undertail coverts have a rufous-chestnut wash, and its underwing coverts and axillaries are white. Its upper breast has large round fulvous spots and its lower breast has narrow streaks of the same color. Its iris is dark brown to amber, its bill black with a gray base to the mandible, and its legs and feet pinkish gray, dark gray, dark greenish, or brownish black.

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