White-shouldered Antbird

The white-shouldered antbird is 17 to 18.5 cm (6.7 to 7.3 in) long and weighs 36 to 40 g (1.3 to 1.4 oz). Both sexes have a ring of bare blue skin around their eye and a red iris. Adult males are mostly black with a small white patch on their shoulder that is usually visible only in flight. Adult females have a black head, neck, upper mantle, and upper breast. The rest of their upperparts are rufous that is somewhat darker on the ends of their wings and tail. Their underparts are cinnamon-tawny that is lighter in the center of their belly. Voice: The white-shouldered antbird is more often heard than seen. Its song is "a short series...that begins with 2 soft notes, first longer than second, followed by mostly flat notes that become more intense and lengthen slightly". The song has been written as "pur, pee-ur pee-ur pee-ur pee-ur" and "her-her hEEr hEEr hEEr hEEr". Its calls include a "short (e.g. 0·09 seconds) 'chirp' ", a "short (e.g.