I don’t know if the rabbit is Iceland’s most dangerous mammal, but it could be. Really Iceland has no dangerous animals. In fact the only land based Icelandic mammal to predate human settlement is the Arctic fox which is believed to have crossed to Iceland over the ice during the last Ice Age. Mercifully it even has very few insects. The midges (very tame by Manitoba standards) can be pesky only because of their vast numbers in only a few places. Most of the island is spared. The way I explain it is that the climate is so bad it keeps the insects away.
Actually as everywhere, the most dangerous animal, by far is Homo sapiens—Us. this guy in particular–J.P he is mad. Watch out. He is determined to enjoy life wherever he is.