"Congregation of Birds"
"Dissimulation of Birds"
"Flight of Birds"
"Flock of Birds"
"Volery of Birds"
Birds (Aves) are a group of endothermic vertebrates, characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton.
Birds live worldwide and range in size from the 5 cm (2 in) bee hummingbird to the 2.
75 m (9 ft) ostrich.