What is it called When an animal mimics another animal?

Batesian mimicry is a form of mimicry in which a harmless species (the mimic) evolves to resemble a harmful or dangerous species (the model) in order to gain protection from predators. The mimic benefits from the resemblance to the model, as predators avoid it, mistaking it for the dangerous or harmful species. Batesian mimicry is named after the British naturalist Henry Walter Bates, who first described the phenomenon in 1862.