18. My wife and I recently located the nest location for a Great Horned Owl in XXXX park. We heard a Great Horned Owl hooting last fall around Halloween. When mice or voles are abundant they will consume these as well. Great Horned Owl nest box – Nikon D500, f7.1, 1/125, ISO 500, -0.7 EV, Nikkor 500mm VR with 1.4x TC, natural light. Will Owls or Hawks Attack my Dog or Cat? The Great Horned Owl will take large prey such as crows, ospreys, and falcons. They will sometimes reinforce the nest with extra bark, leaves, twigs or feathers. We thought they nested in winter. 276 The Wilson Bulletin-December, 1938 of situation in which birds nest, a range of variation unequalled by any other North American bird. We were thrilled to witness on the second night, after quite a bit of owl calls, a second Great Horned owl appeared. Here in Charlo, Montana, is the view of a great horned owl nest from above. Great Horned Owls are very early nesters with egg … Great Horned Owls initiate nesting in winter — in January or February in your neck of the woods. These pellets can aid in understanding what the birds eat by analyzing the contents within them. Any food that is indigestible to these birds such as bones, hair, and feathers, are compressed and regurgitated as compact pellets. — Cole and Flora Albert, Akron, Ohio. The Great Horned Owl mainly depends upon medium-size mammals and birds to rabbits and hares where available. Possibly, but not so much for food. There are a couple of owl nest boxes at the hay barn on Antelope Island State Park and over the years I have seen both Barn and Great Horned Owls use those nest … Why would it hoot in the fall? In the deserts they may sometimes use old woodpecker cavities in large cacti. Great Horned owl sitting on the nest (Image: nature80020 (Jim Kennedy) | CC BY 2.0 | flickr) They most often nest in trees and use a nest that was made by another bird or animal such as hawks, ravens, herons or squirrels. Over the past few days we have been back to visit and check up on the owl. others, it is apparent that the choice of nesting sites of the Great Horned Owls throughout their wide range includes almost every type . The second owl took over the nesting tree and the original Owl took off to go hunting for the night. Behaviour: Great Horned Owls customarily take possession of the previous year’s nest of some other raptor, such as a Red-tailed Hawk, or that of a crow or magpie.