Digestion a thin-walled expanded portion of the alimentary tract used for the storage of food prior to digestion. In some birds it is an expanded, muscular pouch near the gullet or throat. In adult doves and pigeons, the crop can produce crop milk to feed newly hatched birds. Certain insects may have a crop or enlarged esophagus. Herbivores have evolved cecums (or an abomasum in the case of ruminants). Ruminants have a fore-stomach with four chambers. These are the rumen, reticulum, omasum, and abomasum. In the first two chambers, the rumen and the reticulum, the food is mixed with saliva and
An Annotated Checklist of the Birds of the Oriental Region An Annotated Checklist of the Birds of the Oriental Region An Annotated Checklist of the Birds of the Oriental Region is a 1996 softback book published by the Oriental Bird Club, and authored by Tim Inskipp, Nigel Lindsey and Will Duckworth. It contains a list of all 2,586 species recorded in the Oriental Bird Club's areas of operation up to the date of publication. This area approximates to that covered by the Oriental zoogeographical region, with the exception that for countries such as China and Pakistan which straddle the Oriental / Palaearctic boundary, the whole country is included; those species