The family Ptilogonatidae includes 2 species found in North America.

Silky-flycatchers are slender, long-tailed and crested. Males are gray or blue-gray with yellow flanks and crissum, black wings and black-and-white tails. Females similar but more olivaceous in color. They occur in loose flocks, feed on berries and hawk for insects from high, open perches. Nest is an open cup of lichen or moss. Both sexes build the nest. Eggs 2, gray or whitish with brown or lilac markings. Only the female incubates 16-17 days. Both sexes feed young, fledging at 24-25 days.

Phainopepla is slender, long-tailed, crested and shining black with white wing patches in the male, gray in the female. They feed on insects and berries, especially mistletoe. The nest, built mainly by the male, is a compact, open cup in a shrub or tree. Eggs 2-3, rarely 4. Both sexes incubate 14-15 days, fledging at 18-19 days.