Laurie Campbell / Skylark (Alauda arvensis) attracted to feed below seed feeders in a garden after heavy snowfall covering its naturally occuring food supply, Berwickshire. Scotland, December 2010

Jabruson / Sun-dried fish provides many families with a readily available supply of protein and a product to sell at local markets, Gamba, Gabon

Roger Powell / Oystercatcher (Haematopus ostralegus) incubating in a "nest box" placed in a bay of Porsanger fjord. These nest boxes were originally used to provide a supply of eggs for food to local inhabitants, bu...

Bryan and Cherry Alexander / Inuit youth carrying carton of Pepsi from supply plane at Savissivik. Northwest Greenland, 1996. Editorial use only.

Heidi & Hans-Juergen Koch / American Alligator (Alligator mississippiensis) with a freshly killed Egret in its mouth, unlike mammal predators they don't depend on food as a permanent energy supply, in summer and spring they eat...

Jose B. Ruiz / Food stock pile and leftovers of Wood mouse {Apodemus sylvaticus} Europe