Ducula

Trivial name	Latin name
Pied Imperial-Pigeon	Ducula bicolor
Green Imperial-Pigeon	Ducula aenea
Collared Imperial-Pigeon	Ducula mulleri
Pacific Imperial-Pigeon	Ducula pacifica
Pink-headed Imperial-Pigeon	Ducula rosacea
White Imperial-Pigeon	Ducula luctuosa

comparison of wing and tail configuration¹

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