Green Parakeet (Aratinga holochlora) This is the most northerly occurring Aratinga parakeet. The species limits among the three populations of this group have been treated differently by different authors. The American Ornithologists' Union lumps the form from Socorro Island under Green Parakeet but separates the form inhabiting the Pacific slope of southern Mexico to Nicaragua as a distinct species called the Pacific Parakeet. In the U.S the Green Parakeet occurs only in extreme southern Texas.