An owl we share in Europe and the United States and Canada the Great Grey Owl. I was happy to be able to get this close in flight shot even if this meant the lower wing was cropped.. The Great Grey Owl Strix Nebulosa was first described by Johann Reinhold Forster in 1772. The name "nebulosa" is derived from the Latin "Nebulosus", meaning misty or foggy. Adults have a big, rounded head with a grey face and yellow eyes with darker circles around them. These are signs the owl hunts by day, and has remarkable hearing. The underparts are light with dark streaks; the upper parts are grey with pale bars. This owl does not have ear tufts and has the largest "facial disc" of any raptor. In terms of length, the Great Grey Owl rivals the Eurasian Eagle Owl and the Blakiston's Fish Owl as the world's largest owl. However, much of its size is deceptive, since this species' fluffy feathers, long tail and large head obscure a body lighter than most other large owls. The length may range from (24 to 33 inches), averaging (28 inches) for females and(26 in) for males. The wingspan can exceed(60 inches), but averages (56 in) for females and (55 in) for males. The adult weight can range from(1.5 to 4 lbs), averaging (2.8 lbs) for females and (2.2 lbs) for males. Another extraordinary fact is the claws which it locks back under its feet, and in this way is able to lock onto its prey, and then land in a tree without fear of dropping its victim..