Rough-legged Hawk

Buteo lagopus

Its legs are 'rough' with feathers right down to the toes, and its scientific name, lagopus, means 'hare-foot,' for the same furry-looking legs.

Buteo is the Latin name for a buzzard; lagopus joins the Greek lagos, 'hare,' and pous, 'foot.' In Britain it's the Rough-legged Buzzard.