The Eagle Owl is a large and powerful bird, smaller than the Golden Eagle but larger than the Snowy Owl. It has a wingspan of up to 200 cm (5-7 feet). Adult females can weigh in excess of 4 kg (9 lb), in comparison the common Barn Owl weighs about 500 grams (1.1 lb). It mainly feeds on small mammals, but can kill prey up to the size of foxes and young deer (up to 10 kg/22 lb), if taken by surprise. Larger prey (over 3 kg/7 lb) is consumed on the ground which leaves the bird vulnerable (for example to other foxes).