There's a photo in the Wildlife Photographer of the Year competition which I really like (the page may take a couple of seconds to load)
www.nhm.ac.uk
How does an animal work out that that's a workable technique!

Between a Rock and a Hard Place | Wildlife Photographer of the Year | Natural History Museum
Larry Taylor (USA) shows an ermine clambering between rocks, with its white fur framed by the black crevice.
How does an animal work out that that's a workable technique!