Long-tailed parakeet (Vẹt đuôi dài, Psittacula longicauda)

The long-tailed parakeet (Psittacula longicauda) is a parakeet endemic to the regions of Andaman and Nicobar islands, Sumatra, Borneo and Peninsular Malaysia.

Psittaciformes comes from the Ancient Greek word ψιττακός (psittakós) meaning "parrot" combined with the Latin suffix -formes (shape/form), essentially meaning "parrot-shaped" or "of the parrot form," referring to the bird order containing parrots, cockatoos, and macaws. 

The family name Psittaculidae comes from the Latin psittacus (parrot), which itself derives from the Ancient Greek word ψιττακός (psittakós), also meaning "parrot" with the suffix -ula indicating "little" or "diminutive," essentially meaning "little parrots" or "parakeets". It refers to Old World parrots like parakeets and lories. 

Psittacula is a Latinized term meaning "little parrot" or "parakeet," derived from the Latin psittacus (parrot), which itself comes from the Ancient Greek word psittakós (ψιττακός) for parrot, plus the diminutive suffix -ula. The name of the genus is a diminutive of the Latin word psittacus for a "parrot".

The specific epithet longicauda combines the Latin longus meaning "long" and Latin cauda meaning "tail".