Being so sparsely populated, the Berwyn Hills host a diversity of unusual wildlife. Red Kites and buzzards are commonly seen over the hills, but there are more rare species of raptor such as the Hen Harrier, Merlins, Short-eared Owls, Kestrels, Goshawks and Peregrine Falcons.
The Moorlands are managed by the landowners for grouse shooting and red grouse are a common site. You may even see the occasional Black Grouse.
Lapwings, Curlews, Snipes and Golden Plovers can also be seen on occasions.
Smaller birds include Meadow and Tree Pipits, Whinchats, Stonechats, Skylarks, Ring Ouzels, Wrens, Willow Warblers, Whitethroats, Grasshopper Warblers, Chiffchaffs, Cookoos, Linnets, Ravens and Jackdaws.
Otters can be seen around Lake Bala.
The Eagle eyed may spot the rare Welsh Clearwing moth.