The word rabbit, of unknown etymology, seems to be the same word as
leveret or young hare (by the l = r rule). The official history of rabbits claims they were introduced into the UK from Spain by the Romans, then disappeared (probably because Spanish rabbits couldn't cope with British weather), only to be re-introduced by the Normans even though rabbits are prodigious breeders. [The Spanish for rabbit, conejo, is similar to the English coney, and both are used informally for genitalia.. male in Spanish, female in English]
To some extent rabbits have an island connection. If Wiki is to be believed, offshore islands tended to be chosen for warrens, the explanation being that it was easier to protect the rabbits from predators. Not aerial predators presumably. In fact, it could be the reverse, i.e. warrened islands as food stores for specialist birds (or specialist humans?). Rats are good swimmers but mice, like rabbits, are useless at swimming. Also like rabbits, mice breed fast and are a food source for many birds and mammals. One man blogged about how he was going to feed a baby rat to his python (live) but took pity and kept it as a pet. Perhaps he gave his python a grown-up rat instead, he didn't say.
Interestingly, scientists are now claiming that mice are as intelligent as rats and perform the same tasks in the lab.
http://journal.frontiersin.org/article/ ... 00173/full