         feeding is the process by which organisms, typically animals, obtain food. terminology often uses either the suffix -vore from latin vorare, meaning "to devour", or phagy, from greek ÏÎ±Î³ÎµÎ¹Î½, meaning "to eat". ==evolutionary history== the evolution of different feeding strategies is varied with some feeding strategies evolving several times in independent lineages. in terrestrial vertebrates, the earliest forms were large amphibious piscivores 400 million years ago. while amphibians continued to feed on fish and later insects, reptiles began exploring two new food types, other tetrapods (carnivory), and later, plants (herbivory). carnivory was a natural transition from insectivory for medium and large tetrapods, requiring minimal adaptation (in contrast, a complex set of adaptations was necessary for feeding on highly fibrous plant materials). ==evolutionary adaptations== the specialization of organisms towards specific food sources is one of the major causes of evolution of form and function, such as: * mouth parts and teeth, such as in whales, vampire bats, leeches, mosquitos, predatory animals such as felines and fishes, etc. * distinct forms of beaks in birds, such as in hawks, woodpeckers, pelicans, hummingbirds, parrots, kingfishers, etc. * specialized claws and other appendages, for apprehending or killing (including fingers in primates) * changes in body colour for facilitating camouflage, disguise, setting up traps for preys, etc. * changes in the digestive system, such as the system of stomachs of herbivores, commensalism and symbiosis ==classification== ===by mode of ingestion=== there are ma
Eating_behaviors Ethology