The Green Violet-ear Hummingbird (Colibri thalassinus) belongs to the order Apodiformes. Hummingbirds share this order with the swifts, such as the white-collared swift. The name Apodiformes is derived from the Greek words "a pous," meaning "without foot." While apidiforms do in fact have feet, they are quite small and their legs are short and relatively weak. Many birds in this order cannot walk, must fly to turn around on a branch and don't land on the ground.
Ecuadorian Hillstar, (Oreotrochilus chimborazo) is a species of hummingbird found at altitudes of 3,500 to 5,200m, (no other species of hummingbird occurs at higher altitudes) in the Andes of Ecuador and far southern Colombia.
Bee Hummingbird (Mellisuga helenae), perched. CubaThere are over 300 species. (Family Trochilidae, order Apodiformes.) The long cleft tongue of a hummingbird is in the form of a double tube, which can be extended a considerable distance beyond the bill and withdrawn again very rapidly; the sternum (breastbone) is greatly developed, forming a suitable base for the wing muscles; the plumage has a metallic lustre. .