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roller

(Encyclopedia) roller, common name for brightly colored Old World birds noted for performing somersaults in flight. They include the rollers proper (subfamily Coraciinae) and ground rollers (…

cuckoo

(Encyclopedia) cuckoo, common name for members of the extensive avian family Cuculidae, including the ani and the roadrunner (Geococcyx californianus), widely distributed in temperate and tropical…

trogon

(Encyclopedia) trogontrogontrōˈgŏn [key], family of tropical jungle birds related to the roadrunners and including the quetzal. Trogons are sedentary arboreal birds, 10 to 14 in. (25.4–35.6 cm) long…

pigeon

(Encyclopedia) pigeon, common name for members of the large family Columbidae, land birds, cosmopolitan in temperate and tropical regions, characterized by stout bodies, short necks, small heads, and…

sandgrouse

(Encyclopedia) sandgrouse, common name for pigeon-sized, seed-eating, terrestrial birds of the genera Pteroclida (approximately 14 species) and Syrrhaptes (2 species). They are birds of the Old World…

oriole

(Encyclopedia) oriole, common name applied to various perching birds of the Old (family Oriolidae) and New (family Icteridae) Worlds. The European orioles are allied to the crows, while the American…

cotinga

(Encyclopedia) cotingacotingakōtĭngˈgə [key], any of the New World tropical birds of the family Cotingidae. Cotingas range from N Argentina to the southern border of the United States; most are…

bustard

(Encyclopedia) bustardbustardbŭsˈtərd [key], a heavy-bodied, ground-running bird of the family Otididae. Various species are found throughout the arid regions of Africa, Asia, Australia, and S Europe…

sparrow

(Encyclopedia) sparrow, common name of various small brown-and-gray perching birds. New World birds called sparrows are members of the finch family. They were named for their resemblance to the…

homology

(Encyclopedia) CE5 Homology in bones of a bird wing and an amphibian foreleg homologyhomologyhōmŏlˈəjē [key], in biology, the correspondence between structures of different species that is…