Ibis

Ibis is the name for a group of long-legged wading birds with long, downward-curved bills, belonging to the family Threskiornithidae. The most distinctive feature is the long, curved bill, which the bird uses to probe for food in mud, soft ground, and shallow water.

Ibises are typically found in areas with shallow water: marshes, river valleys, wetlands, flooded plains, and coasts. They commonly walk in groups, nest in trees or coastal thickets, and build communal nests. Various species are found across many regions of the world, including Africa, Asia, Europe, the Americas, and Australia.

Appearance and anatomy

The ibis has a slender body and broad wings; when flying, it holds its neck outstretched, distinguishing it from herons, which fly with their necks folded back. The curved bill lacks strong gripping power but is sensitive to touch, allowing it to detect and catch small fish, crustaceans, insects, worms, and aquatic animals in mud. Plumage varies: black, white, chestnut, and some species with metallic bronze sheen.

Scientific classification

The family Threskiornithidae contains two major subfamilies: the ibises (Threskiornithinae) and the spoonbills (Plataleinae), which have spoon-shaped bills. Both groups are similar in behaviour and habitat and sometimes forage in the same locations.

History and culture

In ancient Egypt, one ibis species was associated with the god Thoth, and large numbers of ibises were found mummified. This gave rise to the name 'sacred ibis' for one of the species.

Conservation status

Most species remain abundant, but some have declined due to wetland destruction, agricultural pesticides, and disturbance. A notable example is the northern bald ibis, whose wild population is severely reduced and is now subject to intensive captive breeding programmes.