Warning coloration

thumb|upright=1.2|Many insects including hoverfly|hoverflies (C, D, E) and the [[wasp beetle (F) are Batesian mimics of stinging wasps (A, B), which are Müllerian mimics of each other.]]

thumb|upright=1.5 |The bright colours of this granular poison frog signal a warning to [[predators of its toxicity.]] thumb|upright=1.5 |The honey badger's [[reverse countershading makes it conspicuous, honestly signalling its ability to defend itself through its aggressive temperament and its sharp teeth and claws.]]

substance produced by living organisms that has a color resulting from selective color absorption

general appearance of an animal resulting from the reflection or emission of light from its surfaces

natural phenomenon in which two or more distasteful species, that may or may not be closely related and share one or more common predators, have come to mimic each other's warning signals

set of ritualized behaviours that enable an animal to communicate to other animals about specific stimuli

bluffing threat display of an animal used to startle a predator

thumb|Eyespot (mimicry)|Eyespots of [[foureye butterflyfish (Chaetodon capistratus) mimic its own eyes, which are camouflaged with a disruptive eye mask, deflecting attacks from the vulnerable head.]]