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The Alexandrine parakeet is one of the largest parakeets, measuring 56 to 62 cm (22 to 24 in) from the top of the head to the tip of the tail and weighing 200 to 300 g (7.1 to 10.6 oz). The tail measures 28 to 35 cm (11 to 14 in).
The red-breasted parakeet is now placed in the genus Psittacula that was introduced in 1800 by the French naturalist Georges Cuvier. [4] [5] The genus name is a diminutive of the Latin word psittacus for a "parrot". The specific epithet alexandri is from Alexander the Great whose soldiers introduced parakeets to Greece. [6] Eight subspecies are ...
The Australian budgerigar, or shell parakeet, is a popular pet and the most common parakeet. 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 ...
Many models of communication include the idea that a sender encodes a message and uses a channel to transmit it to a receiver. Noise may distort the message along the way. The receiver then decodes the message and gives some form of feedback. [1] Models of communication simplify or represent the process of communication.
This technique helped Pepperberg succeed with Alex where other scientists had failed in facilitating two-way communication with parrots. In later years, Alex sometimes assumed the role of one of Pepperberg's assistants by acting as the "model" and "rival" in helping to teach a fellow parrot in the lab, as well as correcting their mistakes. [11]
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Palaeornis, the epauletted parakeets is a genus of birds named for the red markings on their upper wings resembling epaulettes. Formerly included in the genus Psittacula , this group of birds comprises two species, only one of which is still extant.
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