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Peregrine Falcon Release Methods

Cross-Fostering

Young Wild Prairie FalconsWith the decline of the peregrine in California, in some inland areas the similar prairie falcon came to occupy historic peregrine eyries. In order to restore peregrines to these areas where no breeding peregrines existed anymore, we cross-fostered young peregrines into prairie falcon nests, relocating the displaced young prairie falcon nestlings to other nearby pairs of prairies. Prior to fostering the peregrines, adult prairie falcons at our facility raised them, so that they would be accustomed to seeing prairie falcons as parents. Several cross-fostered peregrines did retake historic peregrine eyries from prairie falcons, and others have since been recolonized by non-banded peregrines.