Yellow-green Tyrannulet

A large striking finch with a dagger-like bill and different looking sexes. Male is mostly olive with a black throat and yellow eye-ring and moustache; female is brownish and lacks the black throat. Juvenile similar to female but heavily streaked. A critically endangered species endemic to Gough Island, where it is the only songbird; pairs and family groups are widespread on the island, preferring areas above 300 meters of elevation. Male sings a high-pitched whistle, while female answers with a chatter. 

Ashy gray flycatcher with a strong white eyebrow that perches upright on the ground. Found in high-elevation grasslands and pastures. Larger size and more upright posture give it a taller appearance than the similar Cinereous Ground-Tyrant; the long white eyebrow that extends to or past the eye is also a good distinguishing feature (it is much shorter or absent in Cinereous). Does not have a crown patch as many other ground-tyrants do.

Frequents suburban settings across North America, along with open woods, brushy field edges, and deserts. Males vary in shades and intensity of red. Some males are yellow or orange. Females are drab gray-brown overall with plain faces and blurry streaks on underparts. Similar to Purple and Cassin's Finch, but House Finch males are more orangey-red with color equally bright on crown, throat, and breast. Red color is mostly restricted to head and upper chest, contrasting with cold gray-brown nape, back, and wings. Pale sides show distinct brown streaks, lacking red tones. Females lack bold face pattern and have more diffuse patterning overall. Often sings loudly in neighborhoods and visits feeders.