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The grey parrot (Psittacus erithacus), also known as the Congo grey parrot, African grey parrot or Congo African grey parrot, is an African parrot in the family Psittacidae. The Timneh parrot (Psittacus timneh) was previously treated as a subspecies of the grey parrot, but has since been elevated to a full species.
Psittacus is a genus of African grey parrots in the subfamily Psittacinae. It contains two species: the grey parrot ( Psittacus erithacus ) and the Timneh parrot ( Psittacus timneh ). For many years, the grey parrot and Timneh parrot were classified as subspecies; the former as the nominate, the latter as P. e. timneh .
Abnormal behavior of birds in captivity has been found to occur among both domesticated and wild birds. [1] Abnormal behavior can be defined in several ways. Statistically, 'abnormal' is when the occurrence, frequency or intensity of a behaviour varies statistically significantly , either more or less, from the normal value. [ 2 ]
Tori and Dalton train Apollo based on Irene Pepperberg's model/rival technique she developed to train her own African grey parrot, Alex. [3] In the technique, the student (parrot) observes trainers interacting. One of the trainers models the desired student behavior, and is seen by the student as a rival for the other trainer's attention.
Showing dull maroon tail. Growing to 28–33 centimetres (11–13 in) in length and weighing 275–375 grams (9.7–13.2 oz), [6] the Timneh is a medium-sized parrot. Its plumage is mainly a mottled grey, with a white face mask and pale yellow eyes.
Alex (May 18, 1976 – September 6, 2007) [1] was a grey parrot and the subject of a thirty-year experiment by animal psychologist Irene Pepperberg, initially at the University of Arizona and later at Harvard University and Brandeis University.
The black swan, Cygnus atratus is a large waterbird which breeds mainly in the southeast and southwest regions of Australia.An estimated one-quarter of all black swans pairings are homosexual and they steal nests, or form temporary threesomes with females to obtain eggs, driving away the female after she lays the eggs.
N'kisi, another grey parrot, has been shown to have a vocabulary of around a thousand words, and has displayed an ability to invent and use words in context in correct tenses. [91] Parrots do not have vocal cords, so sound is accomplished by expelling air across the mouth of the trachea in the organ called the syrinx.