Peregrine eggs in scrape (1961)

Peregrine Reproduction:

Peregrine falcons can breed in their second year. The average number of young in Montana is 2.0 young per active eyrie. Peregrine falcons continue to breed throughout their life, although productivity declines as the peregrines get older. Peregrines can live up to 20 years of age.

Young peregrines on nesting ledge (1961)

Peregrine falcons choose horizontal ledges to build their scrape, usually in the upper 1/3 of the cliff. They prefer to nest on ledges with overhangs. Potholes are also a favorite location. The female hollows out a shallow indentation (scrape) to lay her eggs. Both the male and female incubate the eggs, but the majority of incubation falls on the female.

Prairie Falcon young and egg (1966)

Prairie Falcons also nest on cliffs and make scrapes to lay their eggs. Note the light brown color of the egg compared to the chocolate brown color of the peregrine eggs. Prairie falcons nest within 1/3 mile of active Peregrine Falcon eyries. Prairie Falcons nest along rivers as well as the more xeric habitats away from waterways.