Hummingbird - Trochilidae

Hummingbirds are birds that comprise the family Trochilidae. (This is a mature male Calliope Hummingbird) They are among the smallest of birds, most species measuring in the cm (3--5 in) range. Indeed, the smallest extant bird species is a hummingbird, the 5-cm Bee Hummingbird. They can hover in mid-air by rapidly flapping their wings 12--90 times per second (depending on the species). They can also fly backwards, and are the only group of birds able to do so. Their English name derives from the cha