The American Ornithological Society (AOS) and the Clements taxonomy add P. h. rubritorquis (Sclater, PL, 1887), which the IOC treats as a separate species, the red-throated parakeet.

BirdLife International's Handbook of the Birds of the World accepts rubritorquis as a species but includes P. h. brevipes (Lawrence, 1871) and P. h. strenuus (Ridgway, 1915) as subspecies of the green parakeet.

Their iris is orange-red surrounded by bare pale beige skin, their bill horn colored, and their legs and feet brownish.

[11] The nominate subspecies of the green parakeet is native in eastern Mexico from Nuevo León and Tamaulipas south to Veracruz.

[11] In the United States, the species is established in the lower Rio Grande Valley of Texas; that sub-population's origin is unknown but could be derived from introduced individuals or by natural dispersion.

[14][15][16][17] In its native range, the green parakeet inhabits semi-open landscapes including deciduous woodland, gallery forest, and scrublands.

Its variety of vocalizations include "sharp squeaky notes", "loud harsh calls", and "shrill noisy chattering".