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of a hummingbird is in the form of a double tube, which can be extended a considerable distance beyond the bill and withdrawn again very rapidly; the sternum (breastbone) is greatly developed, forming a suitable base for the wing muscles; the plumage has a metallic lustre. .
The ground hornbills (Bucorvidae) are a family of the order Coraciiformes, with a single genus Bucorvus and two extant species. The family is endemic to Sub-Saharan Africa. Ground hornbills are large with adults around a metre tall. They are ground-dwelling, unlike other hornbills, and feed on insects, snakes, other birds, amphibians and even tortoises.They are among the longest-lived of all birds.