Other Names: none
Distribution: Alaska and Canada in summer; most of the United States and Mexico in winter.
Size: 9-11 cm in length with a 16-18 cm wingspan, weighing 5-10 g.
Plumage: Olive green overall, with some darker streaking on the wings. There are two white wing bars and one dark bar. Males have a tuft of red feathers on the crown, kept concealed unless the bird is stimulated. The legs are yellowish-brown and the beak and eyes are black.