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Rhea :: Rhea (n.) Any one of three species of large South American ostrichlike birds of the genera Rhea and Pterocnemia. Called also the American ostrich.

Struthionine :: Struthiones (n. pl.) In a wider sense, an extensive group of birds including the ostriches, cassowaries, emus, moas, and allied birds incapable of flight. In this sense it is equivalent to Ratitae, or Dromaeognathae..

Moa :: Moa (n.) Any one of several very large extinct species of wingless birds belonging to Dinornis, and other related genera, of the suborder Dinornithes, found in New Zealand. They are allied to the apteryx and the ostrich. They were probably exterminated by the natives before New Zealand was discovered by Europeans. Some species were much larger than the ostrich..

Nandu :: Nandu (n.) Any one of three species of South American ostriches of the genera Rhea and Pterocnemia. See Rhea.

Cassowary :: Cassowary (n.) A large bird, of the genus Casuarius, found in the east Indies. It is smaller and stouter than the ostrich. Its head is armed with a kind of helmet of horny substance, consisting of plates overlapping each other, and it has a group of long sharp spines on each wing which are used as defensive organs. It is a shy bird, and runs with great rapidity. Other species inhabit New Guinea, Australia, etc..

Odontolcae :: Odontolcae (n. pl.) An extinct order of ostrichlike aquatic birds having teeth, which are set in a groove in the jaw. It includes Hesperornis, and allied genera. See Hesperornis..

Courser :: Courser (n.) A grallatorial bird of Europe (Cursorius cursor), remarkable for its speed in running. Sometimes, in a wider sense, applied to running birds of the Ostrich family..

Dromaeognathous :: Dromaeognathous (a.) Having the structure of the palate like that of the ostrich and emu.

Euornithes :: Euornithes (n. pl.) The division of Aves which includes all the typical birds, or all living birds except the penguins and birds of ostrichlike form..

Wing :: Wing (n.) One of the two anterior limbs of a bird, pterodactyl, or bat. They correspond to the arms of man, and are usually modified for flight, but in the case of a few species of birds, as the ostrich, auk, etc., the wings are used only as an assistance in running or swimming..

Strutter :: Struthious (a.) Of or pertaining to the Struthiones, or Ostrich tribe..

Epiornis :: Epiornis (n.) One of the gigantic ostrichlike birds of the genus Aepiornis, only recently extinct. Its remains have been found in Madagascar..

Palapteryx :: Palapteryx (n.) A large extinct ostrichlike bird of New Zealand.

Cursores :: Cursores (n. pl.) An order of running birds including the ostrich, emu, and allies; the Ratitaae..

Ratitae :: Ratitae (n. pl.) An order of birds in which the wings are small, rudimentary, or absent, and the breastbone is destitute of a keel. The ostrich, emu, moa, and apteryx are examples..

Ostrich :: Ostrich (n.) A large bird of the genus Struthio, of which Struthio camelus of Africa is the best known species. It has long and very strong legs, adapted for rapid running; only two toes; a long neck, nearly bare of feathers; and short wings incapable of flight. The adult male is about eight feet high..

Emu :: Emu (n.) A large Australian bird, of two species (Dromaius Novae-Hollandiae and D. irroratus), related to the cassowary and the ostrich. The emu runs swiftly, but is unable to fly..

Hesperornis :: Hesperornis (n.) A genus of large, extinct, wingless birds from the Cretaceous deposits of Kansas, belonging to the Odontornithes. They had teeth, and were essentially carnivorous swimming ostriches. Several species are known. See Illust. in Append..

Dinornis :: Dinornis (n.) A genus of extinct, ostrichlike birds of gigantic size, which formerly inhabited New Zealand. See Moa..

Struthiones :: Struthiones (n. pl.) A division, or order, of birds, including only the African ostriches..

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