Hummingbirds are in the family Trochilidae and share the Order Apodiformes with Swifts. They include the smallest of birds and are found only in the Americas. They are noted for their ability to hover and fly backwards. 328 species are known, the 2nd highest number for a bird family. (1st are Tyrant Flycatchers) All depend on nectar for their high metabolism and co-evolved with flowering plants. 20 species below have links to more pictures and sometimes videos.