Introduction Climate change Peregrine Falcons Study areas Methods Survey, capture, and breeding biology Nest site characteristics Morphometrics Genetics Tissue collection and DNA extractions Genotyping, sequencing, and statistical analysis Satellite-received telemetry Transmitters Statistical analysis Climatic trends Data collection Statistical analysis Results Surveys and breeding biology Local hunters Literature review Current surveys Prey Nest site characteristics Morphometrics Genetics Genetic diversity Population structure: F statistics, assignment test, and haplotype network Satellite-received telemetry Transmitters: number deployed, longevity, and location classes Breeding home range Outward migration Winter range Return migration Climatic trends Discussion DDT/DDE impacts Density Nest site characteristics Carrying capacity Range expansion Latitudinal summary of breeding Home range size Timing of breeding and migration Weather impacts Ecological impacts of climate change Conclusion Acknowledgments References Appendices A-F.