Great horned owls are one of the earliest breeding raptors, sometimes laying eggs as early as late December or early January. The eggs hatch after about one month of incubation, and then the chicks generally start to wander from the nest onto nearby branches (which is why they are called “branchlings” at this stage) anywhere from 6 to 7 weeks of age, and start flying around at about 10 to 12 weeks. 
Great horned owls generally don’t build their own nest, but rather take over an old nest from another bird species, such as a red-tailed hawk. In fact, this same nest last year was used by ravens which produced several chicks – but it looks like the great horned owls got to it first this year!
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