Bay Hornero

The bay hornero is 16 to 19 cm (6.3 to 7.5 in) long and weighs about 53 g (1.9 oz). It is a stout hornero with a long and nearly straight bill. The sexes' plumages are alike. Adults have a dull buffy white supercilium. Their crown and nape are grayish brown. Their back, rump, uppertail and wing coverts, and tail are chestnut brown ("bay"). Most of their wing is also chestnut brown, with a small area of pale rufous on the inner primaries. Their throat is white with dark tawny brown sides. Voice: The bay hornero's song is "a long, descending, staccato series rather like that of Pale-legged , but with a distinctive closely spaced, ascending terminal component". It has also been described as a "descending, hurried series of loud, fluted notes, ending in a tremolo". Its calls include "an explosive keek or tseek".