The Yellow-rumped Siskin is a small finch of the high Andes. Its black head and back contrast with a bright yellow rump; females and young birds are duller.
Males have a black hood and back, a vivid yellow rump, yellow underparts, and a yellow band on the wing. Females are duller, while young birds are gray-brown with streaking on the chest and flanks.
It uses high-elevation scrub, rocky slopes, and some Polylepis woodland, and feeds mainly on seeds and flower heads. Pairs are seen in the breeding season; at other times it may join small or mixed flocks.
An extinction-risk assessment has not been added yet.