In the spring, there are so many water snakes that congregate on the shores of fresh water streams and lakes in certain areas of Florida that visitors are alarmed. The writhing mass of serpents are so scary that rangers have to close the parks! The banded water snake and the brown snake are harmless, but when dozens amass to find mates, they remind one of a scene from a horror movie! After mating, the snakes slither off by themselves. The females birth up to 60 live young per snake. They eat small amphibians and large aquatic insects and make-up an essential part of the ecosystem.
See and read more at: https://www.livescience.com/snake-orgy-florida.html