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
The Handbook of Australian Sea-birds into their habits, and the problem of their conservation. The second part (Section V) of the book summarises what is known to date of the different species of birds in our region. Where there are adequate data each bird is described under the heads: Field Characteristics and General Habits; Status in Australia; Migration; Voice; Display; Breeding; Enemies and Mortality; Breeding Distribution.” The Handbook of Australian Sea-birds The Handbook of Australian Sea-birds is a book published in 1971 by A.H. & A.W. Reed in Sydney. It was authored by Dominic Serventy, his brother Vincent Serventy, and John Warham. It is in