Ruby-crowned kinglet

This bird, one of the smallest North American songbirds, has olive-green plumage with two white wing bars and a white eye-ring. Males have a red crown patch, which is usually concealed. The sexes are identical (apart from the crown), and juveniles are similar in plumage to adults. The kinglet is migratory, and its range extends from northwest Canada and Alaska south to Mexico. Its breeding habitat is spruce-fir forests in the northern, mountainous, United States and Canada. It mainly eats insects but also fruit and seeds.