Slaty-headed parakeet 
(Vẹt đầu xám, Psittacula himalayana)

The slaty-headed parakeet (Psittacula himalayana) is a bird species of the parrot family Psittaculidae. 
The species' range extends from Pakistan, to Western Himalayas in India through Nepal and Bhutan and up to the Eastern Himalayas in the northeastern Indian state of Arunachal Pradesh. 

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".