Epaulet Oriole
Icterus cayanensis
The epaulet oriole is about 22 cm (8.7 in) long. Males weigh an average of about 45 g (1.6 oz) and females an average of about 42 g (1.5 oz). The sexes have the same plumage. Adults of the nominate subspecies are almost entirely black. They have yellow lesser and median wing coverts that show as the eponymous epaulet on the closed wing. Subspecies I. c. chrysocephalus is also mostly black but has a golden-yellow crown, nape, rump, epaulets, and thighs. Juveniles of both subspecies are blackish brown rather than pure black and their yellow parts are duller than adults'. Voice: The two subspecies of the epaulet oriole have different but similar songs. That of the nominate is "not very musical and has been described as a varied series of ascending and descending notes, also mixing clicks and buzzes". That of I. c. chrysocephalus is "a slow series of ascending and descending notes, usually grouped in phrases of two to three notes".
ID text from Wikipedia, CC BY-SA 4.0
Streak-backed Oriole
Icterus pustulatus
The streak-backed oriole is 19 to 21 cm (7.5 to 8.3 in) long. Males weigh an average of about 43 g (1.5 oz) and females about 35 g (1.2 oz). Adult males of the nominate subspecies I. p. pustulatus have a deep orange head and breast with black lores, chin, and upper breast. Their upperparts are orange with heavy black streaks on the mantle and back. Their tail is mostly black with white tips on all the feathers and white outer edges on the outermost pair. Their lesser upperwing coverts are orange and the rest of their upperwing is mostly black. Voice: The streak-backed oriole's song is a "pleasant series of sweet, clear whistles (some elements repeated)" and its calls include " a saweet!-taweee!-tawee-tawee, a soft churr'teee, and harsh chatters".
ID text from Wikipedia, CC BY-SA 4.0
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