Ruby-crowned kinglet

Description:

The ruby-crowned kinglet is a very small bird that has gray-green upperparts and olive-buff underparts with a hint of yellow. Also a prominent (though broken) white eyering and white wingbar. This wingbar contrasts with an adjacent blackish bar in the wing. Males have a red crown patch, which is usually concealed. The sexes are identical (apart from the crown). The bill is dark and slender.

Habitat:

Spotted in a mixed forest at Celebration Park in Federal Way, Wa. Their breeding habitat is coniferous forests across Canada, Alaska, northern New England and the western United States. They nest in a well-concealed hanging cup suspended from a conifer branch and may lay as many as twelve eggs in a clutch.

Notes:

It's really difficult to get a good pic of these birds - they hop around on middle to lower branches of trees very quickly.