The Grampians is home to over 200 bird species. The low open shrubby woodlands in the park support many nectar feeding birds, and the tall open forest is important for hollow dependent species such as the Powerful Owl, ducks and members of the parrot family.There are also many blue wrens, scrub wrens and robins.
Over forty species of mammal have been recorded in the park.They include possums, kangaroos, wallabies, gliders, echidnas and koalas.There are also many lizards and skinks.
The Wartook Valley is perhaps the best area in the Grampians to view large mobs of kangaroos, and large populations of emus particularly on the Northern Grampians Road and Roses Gap Road. Be extra careful driving at night and early in the morning on these roads.