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Bubo virginianus heterocnemis


The great Horned Owl can be 17-25 inches long, and has 36-60 inch wingspan. They weigh about 3.1lbs. Adults have large tufts by their ears, they are the only large owl in their range to have them. The face disk is either reddish, brown or grey in color, there is always a large white patch on the throat. Its horns are not actually horns or ears, they’re just tufts of fur.


The great Horned Owl is among the worlds most adaptable owls in terms of habitat. they tend to live in deciduous, coniferous and mixed forests. they tend to prefer open habitats so they can hunt and wooded areas to roost.

Predators and Prey

The predominant prey group are small to medium-sized mammals such as hares and rabbits as well as any small to moderately sized rodent such as rats, squirrels, flying squirrels, mice, lemmings and voles.

Great Horned Owl eggs, nestlings and fledglings may be preyed on by foxes, coyotes,or wild or feral cats
There are almost no predators of adults, but they may be killed in confrontations with large eagles, Northern Goshawks, Snowy Owls

Native or Invasive

The Great horned Owl is native to North America.

Form vs. Function

Owls have spectacular binocular vision, allowing them to pinpoint prey and see in low light. The eyes of a Great Horned Owl are nearly as large as those of a human being and are immobile within their circular bone sockets. As a result, instead of turning its eyes, an owl must turn its whole head, the neck capable of rotating a full 270 degrees,

Interesting Facts

Most mortality in modern times is human-related.
The female alone does all the incubation and rarely moves from the nest, while the male owl captures food to bring to her. A fairly dark and grey, heavily barred form. Feet pale with dusky mottling.


  1. Lake Champlain Basin Program, Retrieved October 21, 2012, from http://www.lcbp.org/fwsum.htm#corm