Mink are becoming an increasing problem on the island and are now seen more often than we would like. There are also polecats, weasels, stoats, feral ferrets, rabbits, blue and brown hares and rats. Field voles and mice help feed the buzzard population and of course the many cats, both domestic and feral, that live on the island. There is a good population of shrews and pygmy shrews, the latter being a protected species. Lizards can be found basking in the sun on dry stone dykes and slow worms sunning themselves on the grass and moss.
Frogs are plentiful and there is also a healthy population of both toads and newts.
Grass snakes and adders do well here, too. Beautiful dragonflies are regular visitors to ponds and bogs in the summer and there are always plenty of colourful butterflies and moths to be seen, along with their creepy crawly, hairy caterpillars. One of Mull's natural assets is its rich variety of bird life. Flocks of Great Northern Divers can be seen in the spring on sea-lochs, displaying their summer plumage before pairing off to breed. Little Grebe breed by some of the inland lochs and there have been regular sightings of the Slavonian Grebe.