One of the world’s large owls by length, the Great Grey Owl is an enigmatic predator of coniferous forests close to the Arctic tundra. It's most often seen hunting around dawn and dusk, when it perches silently at the edges of clearings. But as Prof Ben Garrod and Dr Jess French delve deep inside to understand its true secret to survival, they find the deep feathery coat belies a deceptively small head and body that‘s evolved unbelievably powerful abilities to silently detect and ambush unsuspecting prey.