Birds (Aves) are a group of vertebrates which evolved from dinosaurs.They are endothermic, with feathers.. Modern birds are toothless: they have beaked jaws. c2 aviary noun. Amanda Littlejohn (author) on May 25, 2013: Hi priya and thank you so much for leaving your comment! Birds. Birds A1A2B1B2C1C2. b2 bill noun. They use their beaks to build nests. From Longman Dictionary of Contemporary English bird bird / bɜːd $ bɜːrd / S2 W2 noun [countable] 1 BIRD HBP a creature with wings and feathers that can usually fly.Many birds sing and build nests, and female birds lay eggs wild birds The dawn was filled with the sound of birds. Birds live all over the world. Filters. There are about 372 species in 86 genera.They are found in most tropical and subtropical regions. They use grass, straws, twigs, and leaves to build their nest. c2 bird noun. In addition to the many resident birds, a considerable number of migratory species winter in the country to escape their northern breeding grounds. c2 barn owl noun. Enter search text. Different birds build different kinds of nests. Blue birds can't see the color blue. They lay hard-shelled eggs. c1 bantam noun. They have a high metabolic rate, a four-chambered heart and a strong yet lightweight skeleton.. Ecoregions Tourism. The hummingbird can fly backwards, but it can't walk. 6) Birds may be omnivorous, carnivorous or herbivorous in nature depending upon the species and their diet includes everything from flower nectar to insects. An ostrich can run as fast as 43 miles per hour and grow as tall as 9 feet. Most birds build nests to lay eggs and protect their babies. This word is not in OALD. The bird life of Sri Lanka is very rich for its size and 505 species have been recorded. The greatest diversity of parrots is found in South America and Australasia.. Parrots are intelligent birds. I think birds are very interesting, too and I'm glad you enjoyed this article. c2 bald eagle noun. Fun Facts About Birds . See all topics. The birds which are found under water are known as seabirds and water birds. Topic Dictionaries group together words related to common subject areas ... English American English. Basic English Dialogs Word Bank Videos Word Games for Any Occasion Gemma Spelling Town: FREE SPELLING BOARD GAME SPELLING 1 Airports and Air Travel Aliens Animals and Birds Apartments and Houses Art Australia Babies Banks Beach Biology Body Brazil Bugs and Insects Business and Finance Bus Travel Camping Canada Cats Cheating Christmas Clothing and Fashion Coffee Colds and the Flu … Sri Lanka is a tropical island situated close to the southern tip of India. They can carry messages (homing pigeons) and help hunt (falcons). c2 avocet noun. Parrots are birds of the order Psittaciformes. 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