According to the scientific literature, Red-tailed Hawks usually incubate their eggs for about 28-35 days, but the hawks at this site tend to incubate a little bit longer. For example, in 2012 the Cornell hawks' eggs hatched 38-41 days after the first egg was laid. The eggs hatched on April 22, April 24, and April 26.
What time of year do hawks lay their eggs?
Females lay one to five eggs each year in April or May. Both sexes incubate the eggs for four to five weeks and feed the young from the time they hatch until they leave the nest, about six weeks later.
How long do baby red-tailed hawks stay in the nest?
After about 4-5 weeks, food is dropped in nest, and young feed on it themselves. Young leave the nest about 6-7 weeks after hatching, but not capable of strong flight for another 2 weeks or more. Fledglings may remain with parents for several more weeks.