The Black-and-yellow Phainoptila eats fruit in mountain forests, and males and females differ markedly in plumage.
The male has a black head, back, wings, and tail, with a yellow rump and flanks and an olive chest. Females have a black crown and dark olive upperparts; juveniles are duller.
It may briefly join Chlorospingus flocks, then fall behind to feed on fruit. It is seen alone or in pairs, and in small groups after breeding.
An extinction-risk assessment has not been added yet.