The northern bald ibis is a social species foraging in large, loose flocks, mainly for lizards and beetles. These birds feed by pecking at the ground or by probing into cracks and fissures in the earth (9). Nesting also occurs in colonies, usually of around 40 individuals (5). Nests are made from a loose platform of branches lined with grass and placed on the cliff ledge or cave (9). Egg laying occurs from March to April and a female will lay two to four eggs (10). Northern bald ibis are relatively long-lived, with an average life-span of 24 years (10).