The gyrfalcon is a species of falcon which lives on the arctic coasts and islands of North America, Europe, and Asia. It is the largest of all the falcon species. Being well adapted to cold weather, the gyrfalcon has thick plumage and spotted white feathers for blending into the icy background. A recent study from the University of Oxford has uncovered a very unique trait which this species possesses. It is the only known land-based predatory bird to make its home on icebergs floating over the ocean.