Mullerian mimicry is a form of mimicry in which the distinctive appearance using warning colours of two harmful species (toxicity, unpleasant taste, etc.) converges.
This type of mimicry benefits both species as their predators learn even more quickly that it is ill-advised to eat them.
The tropical butterflies Heliconius melpomene and Heliconius erato are an example of Mullerian mimicry: both are toxic and look alike. © David Bygott and Drew Avery, Eol CC by-nc-sa 3.0
Mullerian mimicry - 1 Photo