Moustached Grass-Warbler

Tiny, mostly green bumblebee-like hummingbird with a straight bill, glittering magenta throat, white chest band and sides of rump, and short forked tail. Female very different, with buffy underparts, dark brown ears, and unforked rufous tail with a black band. Found in cloud forest, edges, second growth, and gardens, with some seasonal movements. Often hard to see, but sometimes perches at the top of bare branches. In Andes, compare to the similar Gorgeted Woodstar; male Gorgeted has longer purple feathers on the throat, and female lacks green central tail feathers. At lower elevations compare with Amethyst Woodstar, in which the male has a longer tail and female has a whitish throat and black tail tipped with white. Restricted to Colombia and Venezuela.

A compact, cryptically-colored, very shy bird of grassy areas, including both natural meadows and some agricultural fields, where it remains hidden from view on the ground unless flushed at close range. Both sexes brown overall with a pale face, long white eyebrows, and subtle stippling and striping on the back and breast. Breeding males have a reddish-brown face and throat. Vocal mostly during the breeding season; males give a dry, explosive three-noted song from cover. Flushed birds fly with noisy, whistling wings, unlike crakes or shorebirds. Introduced to Hawaii, found on all of the main islands. A common avicultural bird, so escapees may occur around the world.

Uncommon in forest, marshes, and mangroves, where usually greatly outnumbered by similar Common Black Hawk. Slightly larger and lankier than Common Black Hawk, with longer legs and tail, and adults of the two species have very different calls in flight. Adult Great Black has 2 white tail bands (1 on Common) and less extensive yellow in face. Immature looks whiter-headed than Common (no big black moustaches), and its longer tail has narrower and more numerous pale bars. Usually warier than Common, which can be quite unconcerned by people.