Hello. I was just wondering why certain animals have
crops while other don't? Birds, especially like seed-consuming birds have
crops, as well as grasshoppers, worms. Is it because crops can help them
store as much food as possible while exposing them to the predator for
the shortest time possible? then why do snails have it too? aren't they
really slow anyway?..thank you!
Some birds have well developed crops, others do not, and yes it seems to be
an adaptation for storing food that is eaten very quickly and then digested
over a period of time, perhaps more of an adaptation to the type of food and
how it is found rather than as predator avoidance. Also the crop in birds
like doves is used to produce "milk" for the young. See a very good
discussion in the Audubon Society Encyclopedia of North American Birds"
edited by John Terres. I do not know much about crops in other types of
animals, but might guess the adaptation to be similar?
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Update: June 2012