Which bird was sacred to the Egyptians?

The ibises are a group of long-legged wading birds in the family Threskiornithidae, that inhabit wetlands, forests and plains. "Ibis" derives from the Latin and Ancient Greek word for this group of birds.

Ibises all have long, down-curved bills, and usually feed as a group, probing mud for food items, usually crustaceans. They are monogamous and highly territorial while nesting and feeding. Most nest in trees, often with spoonbills or herons.

The African sacred ibis was an object of religious veneration in ancient Egypt, particularly associated with the deity Djehuty or otherwise commonly referred to in Greek as Thoth. He is responsible for writing, mathematics, measurement and time as well as the moon and magic. In artworks of the Late Period of Ancient Egypt, Thoth is popularly depicted as an ibis-headed man in the act of writing.