キムネヒメアリサザイ Myrmotherula sclateri

Small yellow-and-black streaked antwren of mature rainforest canopy. Males are yellow with extensive black streaking; females are similar, with a reddish wash in the face. Yellow throat of both sexes distinguishes them from similar Pygmy and Moustached Antwrens (with white or buffy throats); female Sclater’s also have streaking on the center of the breast, unlike those species. Moves singly or in pairs with mixed species flocks in the forest canopy, but very difficult to see, and much more often heard. Listen for a slow series of 3-6 whistles, “wheew, wheew, wheew, wheew,” similar to a Fasciated Antshrike song but higher pitched and slightly weaker.