Boa constrictor

The mating season lasts from April to August. A male will mate with several females during this time.

An excerpt from the article 17 facts about Boa constrictor

It is the female who chooses her mate, first by attracting him with pheromones and then by fighting and assessing his ability to procreate. Copulation can last from a few minutes to a few hours, and the sperm deposited by the male can remain in the female's body for up to a year.