Since birds cannot chew their food due to the lack of teeth, they swallow their prey whole. Indigestible parts such as feathers and bones are later regurgitated as pellets. With the help of the excellent illustrations in this identification guide, even laypeople can reliably identify the small mammal skulls contained in the pellets and thus learn more about the feeding behavior of native raptors and birds of prey. The 2nd edition has been fully updated and supplemented with new illustrations.