The island is home to several species of mammals. The rocky terrain and dense vegetation is home to the allied rock-wallaby
. The subtle colouring of this wallaby can make it difficult to see amongst the rocks.
The rock-wallaby moves quickly and surely around its rocky habitat, helped by short toenails on its hind feet. It is most active when feeding in the early morning and late afternoon.
Koalas were introduced to the island in the 1930s to remove them from perceived threats to their survival on the mainland.
By day, they rest motionless amongst eucalypt branches, feeding on eucalypt leaves from late afternoon onwards.
The koala rests for up to 20 hours a day to save energy because its diet of eucalypt leaves is so poor.
Common brushtail possums are very active at night, feeding on flowers, fruit and leaves. During the day they hide in hollow branches or fallen logs.
Other mammals seen on the island include echidnas, black flying-foxes and little bentwing bats.
Large marine animals that may be seen around the island include sea turtles and dugongs.They feed in the extensive seagrass meadows surrounding the island. Sea turtles also nest on the island's beaches during the summer months.
Over 180 species of birds can be seen on Magnetic Island. Some birds are present all year round while others are migratory visitors.
Seabirds include gulls, terns, sandpipers, dotterels, ospreys and white-bellied sea eagles. Swamphens, grebes and black ducks are associated with freshwater habitats, and a variety of species are associated with terrestrial environments including the peaceful dove, pied currawong, and yellow-bellied sunbird.
Once common along the eastern coastline, the bush stone-curlew can still be seen in large numbers on the island.