North American Birds

ACKNOWLEDGEMENTS

Our primary thanks go to the numerous individuals who have contributed observations to eBird or to us separately, as updates such as this would be impossible without them. Most are listed at the head of this paper, and we apologize to anyone who may have been inadvertently omitted. Photographers who kindly gave their permission to include their work here receive our special thanks. Of course, eBird itself is now responsible for facilitating most of the distributional information surfacing for our area, as for many others. The online site VertNet and other museum websites made our discovery of many important specimens possible. Museums housing those specimens are listed at the head of this paper, and we thank those museums and their dedicated staff for maintaining these invaluable resources. Access to much of the scientific literature was made possible by SORA (Searchable Ornithological Research Archive, sponsored by the University of New Mexico Libraries). Observations made via permit aboard NOAA ship Reuben Lasker were made by Michael Force and Dawn Breese (Southwest Fisheries Science Center, Jeff Moore Chief Scientist for the 2018 California Current Ecosystem Survey). Many other individuals who have assisted us in numerous other ways are also listed above. Coauthors of previous editions of the checklist are acknowledged again for setting the stage for what has followed: R. Carmona, R. A. Hamilton, S. N. G. Howell, M. J. Iliff, M. A. Patten, and G. Ruiz-Campos. Howell continued to set us straight in many ways, commented on a draft of this paper, and was especially helpful in editing our comments on the age and sex (and identity!) of many birds under discussion. Any remaining errors in judgment concerning the photos, however, are our own. Iliff also wrote the Hurricane Rosa account and made helpful comments on a draft of the paper, as did Steven G. Mlodinow, Philip Unitt, Gorgonio Ruiz-Campos, Michael L. P. Retter, and Daniel D. Gibson. César García prepared the maps.

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