Plumages, Molts, and Structure

The following description is based on Hellmayr (1907) and on Rasmussen and Collar (2002):

Adult: Upperparts (including tail and wings) generally dull brown; edgings to secondaries often buffy. Lores rufous brown. Sides of the head, below and behind eye (including auriculars), dark gray. Chin pale rufous, shading to rufescent brown on the throat and breast. Flanks dull fulvous, center of belly whitish. Undertail coverts white.

Juvenile and immature: Undescribed

Undescribed.

Iris: brown

Bare orbital ring: coral red, reddish purple; narrow

Bill: maxilla black; mandible dark gray, greenish gray

Tarsus and toes: gray, olive gray

Bare parts color data based on specimens in the Museo de Historia Natural de la Universidad Nacional Mayor de San Marcos, Lima, and the Field Museum of Natural History.

Total length: 14–15.5 cm (Rasmussen and Collar 2002, Schulenberg et al. 2010)

Linear measurements (from Hellmayr 1907 and Gyldenstolpe 1945; n= 5, sexes combined):

wing length: mean 63 mm (range 62-64 mm)

tail length: mean 56.1 mm (range 53-59 mm)

bill length: mean 23.3 mm (range 22.5-25 mm)

Mass: male, 15.4 g, 17 g (n = 2; O'Neill 1974); female, 19 g, 19.9 g (n = 2; O'Neill 1974)