Also some crustaceans. Tilts bill down to drain water out of pouch, then tosses head back to swallow. Sometimes scavenges and will become tame, approaching fishermen for handouts. Nesting First breeds at age 3 years or older. Nests in colonies.
Site is on ground or cliff of island, or on low trees such as mangroves.
White, becoming nest-stained. Incubation by both sexes, roughly 28-30 days. Young may leave ground nests after about 5 weeks and gather in groups, where returning parents apparently can recognize own offspring. Age at first flight varies, reportedly 9-12 weeks or more. Adults continue to feed young for some time after they leave colony.