twistlock

The green imperial pigeon (Ducula aenea) is a large forest pigeon. The green imperial pigeon is a large, plump pigeon, 45 cm in length. Its back, wings and tail are metallic green. The head and underparts are white, apart from maroon undertail coverts. Sexes are similar. The bird's call is deep and resonant, and is often the first indication of the presence of this treetop species. The Nicobar imperial pigeon (Ducula nicobarica) is sometimes still considered conspecific.