Owls build their nests with what?

Owls do not build their own nests. Some species use old hawk, crow or raven nests. A few others use a scrape on the ground, and a number of small owls nest in tree cavities or nest boxes.

Incubation begins when the first round white egg is laid. During incubation, the male will feed the female and both parents take care of the nestlings. Most owl species lay 2–7 eggs that hatch in about 3–4 weeks. Young owls leave the nest from 27–70 days after hatching, with larger owls staying in the nest longer.

Some of the tree-nesting owlets do something called branching, in which they climb around on tree trunks and branches before they can fly. Owlets stay with their parents for most of the summer before finding a territory of their own.