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In page Parakeet:

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Parakeets comprise about 115 species of birds that are seed-eating parrots of small size, slender build, and long, tapering tails.[citation needed] The Australian budgerigar, also known as "budgie", Melopsittacus undulatus, is probably the most common parakeet. It was first described by zoologists in 1891. It is the most popular species of parakeet kept as a pet in North America and Europe.