Cochineal
A sieve beak is a beak that is adapted to a special form of food acquisition - " sieving " (outdated for " sieving, sifting " ). It is found in particular with the flamingos and some species of ducks .
When straining, the beak is opened so that water or fine mud can flow in, then it is quickly closed again. The water is pumped out again through the horn ridges of the colander, so-called lamellae, whereby fine food particles get caught in the lamellae and are finally swallowed. The food particles can be insects, worms, snails, spawn or parts of plants.
literature
- Ralf Wassmann: Ornithological pocket dictionary . AULA-Verlag, Wiesbaden, 1999. ISBN 3-89104-627-8