Why aren there any snakes in ireland?
When snakes evolved, in the late cretaceous about 150 million years ago, Ireland was underwater still. Some snakes may have crossed over from Europe after this but they would certainly have been killed off during the following ice ages. Since then it has not been possible for snakes to live in Ireland as it is an island, and there are no snakes in close geographic proximity to Ireland that can cross the Irish sea. There are snakes in Britain as, unlike Ireland, it was easier for snakes to cross over from Europe due to a more recent land bridge. I hope this answers your question!
