Black-eared warbler
The black-eared warbler or Costa Rican warbler is a species of bird in the family Parulidae. It was previously considered conspecific with the three-striped warbler and the Tacarcuna warbler.
Description
The black-eared warbler measures in length. It is mostly olive-brown with a buffy belly and underparts. It has distinct black and white striping on the head and a dark cheek. Male and female three-striped warblers have similar plumages.Their song is a rapid series of squeaky chirps.