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

comparison of wing and tail configuration1

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