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
Birds of the Amazon roads and logging deters birds and other animals from living in those sections of the forest. It can be observed that there is a lot less bird movement near areas with roads and lodging than those without. Understory species are especially vulnerable to effects of road clearing. Even roads that are narrow with less traffic can have a significant impact on the movements of insectivorous birds in the Amazon. Birds of the Amazon An immense number of bird species live in the Amazon rainforest and river basin (an area which is nominally home to one out of every ten known