The Red-breasted parakeet, Psittacula alexandri, is among the more widespread species of the genus and is the species which has the most geographical variations. An alternative name is the Moustached Parakeet depending on subspecies. Most of the subspecies are confined to small islands or a cluster of islands in Indonesia. One subspecies occurs in the Andaman islands, and one subspecies occurs in continental Southeast Asia and partly extending to northeastern parts of South Asia along the foothills of the Himalayas. Some of the island races may be threatened by the wild bird trade. The nominate race, which occurs in Java, is close to extinction.
Feral populations of this species have now established themselves in cities like Mumbai and small numbers occur in other cities such as Chennai and Bangalore in India.
The binomial commemorates Alexander the Great.
There are several subspecies:
Psittacula alexandri (Linnaeus) 1758
- Psittacula alexandri abbotti (Oberholser) 1919
- Psittacula alexandri alexandri (Linnaeus) 1758
- Psittacula alexandri cala (Oberholser) 1912
- Psittacula alexandri dammermani Chasen & Kloss 1932
- Psittacula alexandri fasciata (Statius Muller) 1776
- Psittacula alexandri kangeanensis Hoogerwerf 1962
- Psittacula alexandri major (Richmond) 1902
- Psittacula alexandri perionca (Oberholser) 1912