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
Memorandum of Understanding on the Conservation of Migratory Birds of Prey in Africa and Eurasia Memorandum of Understanding on the Conservation of Migratory Birds of Prey in Africa and Eurasia The Memorandum of Understanding on the Conservation of Migratory Birds of Prey in Africa and Eurasia (Raptors MoU) is an international, legally non-binding agreement to protect migratory birds of prey. Hawks, eagles, and falcons can function as indicator species of the ecological condition of a region. As they are at the top of the food chain, these species may be among the first to be affected by environmental pressures such as drought, habitat degradation, and the use of pesticides. Monitoring the population trends of birds