Black-masked Finch Coryphaspiza melanotis

Distinctive finch with a disjunct distribution. Males have an olive-green back with black streaks, and a contrasting face pattern with a broad white eyebrow and a black mask. Note the bicolored bill. Female lacks the bold head pattern. Inhabits well-preserved tall natural grasslands with scattered shrubs. Song is a very high, thin “tziieep...tsi-tsíp...zz-tzzz...”