Acknowledgments
Thank you to Teia Schweizer for preparing libraries for sequencing, Christen Bossu for bioinformatic counsel, and Aya Brantley for the illustration of C. anna in Fig. 1. Nestlings and fledglings that did not survive rehabilitation were provided by Liberty Wildlife (Arizona, USA), Wetlands and Wildlife Care Center (California, USA), Lindsay Wildlife Experience (California, USA), and Santa Barbara Wildlife Care Network (California, USA). Thanks to John Klicka and the Burke Museum for supplying samples from the northern expanded region. This project was supported by funding from CalTrans 65A0686 (USDOT 69A3551747114) to R.A.B and L.A.T, and NSF Rules of Life EAGER 1837940 to R.A.B and K.R. This work used the Extreme Science and Engineering Discovery Environment (XSEDE), which is supported by National Science Foundation grant number ACI-1548562.