Large, slightly ungainly raptor with long and very broad wings, a shortish tail, and a conspicuously big head. Pale belly and underwings contrast with the darker head in most adults, but juveniles have pale heads. All age groups have a tendency to look a bit disheveled. On perched birds look for the owl-like face and unfeathered legs. Hunts over open areas, spending lots of time hovering with rowing wingbeats into the wind.