Australasian Crested Grebe - Kathy Reid

Grebe selecting a feather to feed chick

One suggestion is the ingested feathers form a plug in the pylorus, between the stomach and small intestine, which acts as a strainer to keep fish bones in the stomach long enough to be completely digested.

crested grebefemale crested grebegrebegrebe chickwater birdsbirdlakefeatherschristchurchnew zealandnz