In general, larger owls are more resilient to cold than smaller owls. Great Horned and Great Gray Owls are large and well insulated with downy feathers. Big-bodied Snowy Owls are especially well adapted to frosty temperatures, with feathered feet and a dense layer of insulating feathers so effective they’re second only to Adélie Penguins of Antarctica at retaining body heat, allowing the owls to endure temperatures down to −40 degrees Fahrenheit.
