Matthew Maran / Man about to eat a beef burger with bacon, cheese and lettuce, London, UK.

SCOTLAND: The Big Picture / Wild venison producer, Forest to Fork, selling burgers at Farmers Market. Culbokie, Ross and Cromarty, Scotland, UK.

Dietmar Nill / Captive Chimpanzee (Pan troglodytes) in Burger zoo, Arnheim, Netherlands

Dietmar Nill / Captive Gorilla (Gorilla gorilla) feeding on leaves at Burger zoo, Arnheim, Netherlands

Dietmar Nill / Captive Common Squirrel monkey (Saimiri sciureus) on branch at Burger zoo, Arnheim, Netherlands