Question: How soon will the eggs hatch? Answer:  Peregrine eggs hatch “about a month” after incubation begins. Birds of the World says the time span is … According to A. Hagar (in Bent 1938b), incubation period is 33–35 days, not 28–29 days, as commonly stated. Based on captive falcons, about 33.5 days. Direct observation of identified eggs … Continue reading Nesting: When Will The Eggs Hatch?