The family Regulidae includes 2 species found in North America.

Kinglets are found in coniferous and mixed forests in North America and Eurasia. They are small (9 cm.) greenish above, whitish to yellowish below with white wing bars. They differ mainly in crown markings. Kinglets feed on insects gleaned from foliage and often hover to take prey from leaves. The nest is a bulky purse-like structure of moss suspended from, or attached to, twigs or branchlets. Eggs 5-10, white or buffy, usually with brown spots.