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High Quality Content by WIKIPEDIA articles! The Yellow-backed Oriole (Icterus chrysater) is a species of bird in the Icteridae family. Yellow-backed orioles are a yellow-bodied, sexually monomorphic species. Howell and Webb (1995) note that this species tends to average 21.5 cm (8.5 in) in length from beak to tail; making Icterus chrysater a relatively medium-sized species. Exposed skin and claws are bluish-black; in adults, the bill is black, with the base of the mandible becoming bluish-grey. Adult males display strongly contrasting yellow and black plumage. The wings, tail, shoulders, throat, and face are all black; by contrast, the back and underparts are an extremely bright yellow. Adult females closely resemble males, but yellow parts appear slightly greenish. Despite differences in plumage coloration between sexes, it is likely that this species is extremely difficult to sex in the field.
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0.22 x 0.15 x 0.005 m; 0.132 kg