1. After mating, the male sex tape seals the snake hole female secretions from their kidneys. This stamp serves as a sort of "chastity belt" which prevents the pairing of the other males and guarantee fertilization by the first male to the female draws near.
2. Male rinodermy Darwin - a frog, living along the southern coast of Chile, - after the fertilization of eggs and swallows it holds in its voice bag. When the tadpoles are growing up, he opens his mouth and lets them out.
