1) Biological interaction 
In ecology, crypsis is the ability of an organism to avoid observation or detection by other organisms. It may be either a predation strategy or an antipredator adaptation, and methods include camouflage, nocturnality, subterranean lifestyle, transparency, and mimicry. The word can also be used in the context of eggs and pheromone production. Cryp...[taxonomy] Looking southwest in my back yard. ...
Patterning or coloration that allows a bird to remain concealed by blending in to its environment.
the ability for a organism to blend in with its environment.