Hadada Ibises are noisy birds with a familiar loud yelping cry. Sacred Ibises are generally silent but sometimes voice a harsh croak. These birds feed by touch rather than sight. They probe the mud and search under water for slow moving animals such as fish, insects, crustaceans and amphibians. They also eat scraps of carrion .
Most ibises are colonial nesters, and sites can include many thousands of birds.
Most ibises nest in bushes. Males display then eventually choose a mate. The pairs then engage in mutual bowing and display preening. Males usually gather nest materials, which they ritually offer to their mates. Both sexes incubate the eggs and feed the young.