Rondonia Bushbird

The Rondonia bushbird is 16 to 18.5 cm (6.3 to 7.3 in) long and weighs about 31 to 36 g (1.1 to 1.3 oz). It is rather stocky with a short tail. Its large bill is laterally compressed and the mandible is upturned. The sexes have different plumage. Adult males are mostly dark gray, with a hidden white patch between their shoulders and a slightly blacker bib. Adult females have a chestnut head and upper back, with a concealed white patch like the male's. Their lower back is brown, their uppertail coverts gray, and their tail black. Voice: The Rondonia bushbird's song is "tree-tree-tree, consisting of long sequences of regularly spaced, essentially identical whistled notes" that can be heard beyond 100 m (300 ft). Its calls include " a slightly chattering but relatively steady series of very slightly squeaky notes, and a single-note contact call...in a sequence of seven or eight notes".