Great Horned Owl Nest

This Great Horned Owl nest is on property owned by the city of Louisville, in Colorado.

Last year, a pair of Great Horned Owls nested in a squirrel nest, that was just to the left of the tree stump (the one with the thermometer on it).

When nesting on a squirrel’s nest, Great Horne Owlets, frequently destroy it as they grow. As young Great Horned Owls grow and move around their nests they frequently break the nest apart; which is what happened to that nest.

Therefore, a structure was made and placed on the tree.

A pair of Great Horned Owls have been looking at this structure as a nesting site.

Watch below to witness the owls in real time.

  We are proud to announce a partnership with the City of                        Louisville, Colorado  on this project.

We are proud to announce a partnership with the City of Louisville, Colorado on this project.

Some information about Great Horned Owls


1) With the exception of the Snowy Owl, the Great Horned Owl is the largest ad heaviest owl found throughout much of North America.

2) Great Horned Owls are one of the earliest nesting birds in North America. It is common to find Great Horned Owls nesting in January. But frequently being nesting in February and March.

3) Female Great Horned Owls begins incubation as the first egg is laid. They can have as many as four owlets, however two to three owlets are average.

4) Incubation lasts about 35 days. Both birds tend to the nest, but the female does most of the incubation.

5) Great Horned Owls prey upon the widest variety of prey items of any owl species. Great Horned Owls preferred prey are lagomorphs (rabbits and hares). But also feed upon insects, reptiles, including lizards and snakes, shrews, mice, vole, rats, squirrels, including red, fox, gray, rock and grounds squirrels. They also have been know to catch animals as large as half-grown raccoons, house cats and small dogs. As for birds, they prefer game birds, such as quail, pheasants, grouse and turkeys. But also take, loons, grebes, shorebirds, waterfowl, wading birds, warblers, finches, sparrows, nighthawks, poorwills and the like, and birds of prey including hawks, falcons, owls and kites.

6) Young Great Horned Owls remain on their nests for varying lengths of time, depending upon where the nest is and what it is made of. If the nest they have chosen is well constructed and in a safe place, the owlets may remain on it for up to four or five weeks before fledging.

7) Young Great Horned Owls can remain with their parents until the following nesting season begins, but often leave their parents by mid-to-late summer.

Below are a few photos of Great Horned Owls