This incredible image shows an enormous wild great grey owl sitting bolt upright on top of a woman's HEAD while on the lookout for food. br br The huge bird of prey made a beeline for Libby Corbin, 63 - using her as a perch to get a better view of mice on a forest floor. br br It took her by surprise as it swooped down and landed on top of her woolly hat for around a minute before flying off to catch its prey.