It is said that there is not a single snake on the island of Northern Ireland. Why? Affected by the natural environment and geographical environment?

There is no so-called Northern Ireland, only the island of Ireland. Northern Ireland is just a state in the north of the island of Ireland that belongs to the United Kingdom (UK). As for the absence of snakes, this is because Ireland is located in the high latitudes of the North Atlantic, and the temperature is not high enough for snakes to survive. In addition, Ireland is an outlying island, so there are no snakes migrating from other parts of the mainland, so the natural environment on Ireland is There are no snakes in the environment.