​This entire effort relies entirely on volunteers and collaborators wanting to help contribute to peregrine falcon conservation in California.  A few of us who have been studying peregrines for decades, including some no longer with us, have gathered nest site data over many decades and from many sources. 

     The CPP has compiled and digitized the locations of over 400 known or highly suspected nesting locations previously occupied by peregrines.  Mostly these are on natural cliffs, but in recent decades a growing number are on bridges, buildings, water and communications towers, and other human-made artificial structures.   The map provided here shows most of these locations, and that database grows each nesting season.  Some are not shown for confidentiality reasons, but they are included in our summary analyses.

     A highly effective and widely used technique used to survey for nesting territory occupancy is to play recordings of peregrine falcon vocalizations.  Playing one or more of these calls usually quicky elicits responses from one or both of the territorial adults at their nesting cliffs.   We have also provided a recommendation for an effective and highly portable speaker that is linked by Bluetooth to your cell phone. A link to this product is available here.  

     Joe Barnes and his colleagues developed and tested a 10-minute call -broadcast protocol that we recommend.  Many peregrine researchers have adopted it with great success.  We have attached a link to their article describing the approach (J. Raptor Res. 46(4): 365-377).  It has proven very effective and we urge our cooperators to implement it if possible. 

     We are requesting anyone with knowledge of peregrine nesting territories, past and present, please contribute this information via the CPP Observation Form provided on this website. 

     Past observations are needed, not just current year observations.  You can simply fill out as much of the form as possible and indicate the date (or the year) for the observations you are submitting.  If you wish to keep this information confidential, please check that option and we will 100% honor your requests.

     Unless you request anonymity, all contributors will be acknowledged on this website at the end of each field season, and they will be listed as a contributor in any reports or publications that use your information.

    We look forward to your contributions and if you have any questions, please contact Carl Thelander or Grainger Hunt at the email addresses provided.