An unlikely tale, perhaps—yet Ireland is unusual for its absence of native snakes. It's one of only a handful of places worldwide—including New Zealand, Iceland, Greenland, and Antarctica—where Indiana Jones and other snake-averse humans can visit without fear.
Why snakes are not in New Zealand?
New Zealand is one of several large islands around the globe where there have never been native snake populations. ... Since snakes have neither evolved nor been deposited on the islands of New Zealand, their appearance would be a threat to other local wildlife, and so they are vigorously repelled.
Are snakes in every country?
Snakes are found in almost every country in the world, but there are a few places without wild1 snakes. ... There are also snake-free parts of the oceans, and probably there are some urban areas that are so disturbed that no snakes live there any more (e.g., downtown Manhattan), although they once did.