Psittacula

Trivial name	Latin name
Lord Derbys Parakeet	Psittacula derbiana
Plum-headed parakeet	Psittacula cyanocephala
Ring-necked Parakeet	Psittacula krameri
Layard's Parakeet	Psittacula calthropae
Alexandrine Parakeet	Psittacula eupatria
Long-tailed Parakeet	Psittacula longicauda
Slaty-headed Parakeet	Psittacula himalayana
Malabar Parakeet	Psittacula columboides

comparison of wing and tail configuration¹

¹ According to Hartmann (2000a, 2000b and 2016)