Aldabra Atoll in the Seychelles, introduced populations on Seychelles islands of Fregate, Cousin, Mahe, and Curieuse. Large herds frequent open grass swards with trees and shrubs.
Individuals also live in scrubland and mangrove swamps.
February to May. June to September. 4 to 14 eggs are laid, possibly in multiple clutches. Primarily herbivorous, but also eat crab, carrion , and carcasses of dead tortoises. Mainly graze, but also browse to about 1 meter.