What is mimicry in animals and who should be more in nature – animals with mimicry, or those to whom they imitate, and why?

What is mimicry in animals and who should be more in nature – animals with mimicry, or those to whom they imitate, and why? What factor contributed to the survival of copycats?

1) Animal mimicry is the imitation of non-toxic or lacking pronounced means of protecting animals to other, protected animals.
2) Unprotected animals are usually much smaller than protected ones. Otherwise, they will be eaten quickly enough.
3) Natural selection first preserved the protected forms, i.e. they arose earlier, and then the unprotected ones appeared, which are often lost among the protected