Great bustard it well camouflaged in open habitats. Immature birds resemble the female. The eastern subspecies ("O. t. dybowskii") is more extensively grey in colour in both sexes, with more extensive barring on the back. The great bustard has long legs, a long neck and a heavy, barrel-chested body. It is fairly typical of the family in its overall shape and habitat preferences. Three other bustard species overlap in range with this species: the Macqueen's ("Chlamydotis macqueenii"), houbara ("Chlamydotis undulata") and little bustards ("Tetrax tetrax"). However, none of these attains the plumage coloration nor approach the body sizes of this species. Thus,
Suchindram Theroor Birds Sanctuary trees and other bushes have formed an island at the centre, which gives refuge and is a resting place for birds. Suchindram is noted for the wide variety of migratory waterbirds that winter there, including: near threatened painted stork and spot-billed pelicans. Also seen here are cattle egrets, great cormorants, darters, purple swamphen, and bronze-winged jacanas. Resident raptors include pied kingfisher, brahminy kite and marsh harrier. Other water birds are dabchick, grey heron, garganey, purple heron, cinnamon bittern, open bill stork, cotton pygmy goose, whiskered tern and little tern, black-winged stilt, greenshank, little ringed plover and the common sandpiper In