Greyish Baywing
Agelaioides badius
The greyish baywing is 19 cm (7 in) long. Males weigh an average of about 46 g (1.6 oz) and females average about 42 g (1.5 oz). Both sexes of both subspecies have the same plumage though A. b. bolivianus is larger than the nominate A. b. badius. Adults have a mostly grayish buffy brown head, neck, and upperparts. They have blackish lores and ear coverts and an otherwise grayish buffy brown face. Their uppertail coverts are olive-brown and their tail very dark olive-brown. Voice: The greyish baywing sings "a quiet, musical continuum of warbles and trills, often in chorus". In flight both sexes give a "clear prolonged whistle peeeooh". Its primary call has been written as a "harsh, hoarse, guttural chuck", " a squeaky chayt, chap", a "weak kik errt, kik, riiie, kik krrr, krrr and tji drrrrrrt", and "a sharp clear tuit".
ID text from Wikipedia, CC BY-SA 4.0
Yellow-rumped Cacique
Cacicus cela
The male is on average 28 centimetres (11 in) long and weighs about 104 grams (3.7 oz), with the female 23 centimetres (9.1 in) long and weighing approximately 60 grams (2.1 oz). The yellow-rumped cacique is a slim bird, with a long tail, blue eyes, and a pale yellow pointed bill. It has mainly black plumage, apart from a bright yellow rump, tail base, lower belly and wing "epaulets". The female is duller black than the male, and the juvenile bird resembles the female, but has dark eyes and a brown bill base.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
Learn this pair in BeakBrain
Photo and call practice, free in any browser.
Play BeakBrainPhotos and recordings are credited to their authors under the licence shown. Full profiles: Greyish Baywing and Yellow-rumped Cacique.