Crop (anatomy) Crop (anatomy) A crop (sometimes also called a croup or a craw, or ingluvies) is a thin-walled expanded portion of the alimentary tract used for the storage of food prior to digestion. This anatomical structure is found in a wide variety of animals. It has been found in birds, and in invertebrate animals including gastropods (snails and slugs), earthworms, leeches, and insects. Cropping is used by bees to temporarily store nectar of flowers. When bees "suck" nectar, it is stored in their crops. In a bird's digestive system, the crop is an expanded, muscular pouch near the gullet or throat.
Handbook of the Birds of the World are large, measuring , and weighing between ; it has been commented in a review that "fork-lift truck book" would be a more appropriate title. As a complement to the "Handbook of the Birds of the World" and with the ultimate goal of disseminating knowledge about the world's avifauna, in 2002 Lynx Edicions started the Internet Bird Collection (IBC). It is a free-access, but not free-licensed, on-line audiovisual library of the world's birds with the aim of posting videos, photos and sound recordings showing a variety of biological aspects (e.g. subspecies, plumages, feeding, breeding, etc.) for every species. It is