The hermit warbler has been taken three times in January in central western California (San Gerónimo and Point Reyes, Marin County; and Pacific Grove, Monterey County).
Migration.—Late dates of spring departure from the winter home are: Guatemala—Tecpán, March 29. Sonora—Rancho la Arizona, May 8. Arizona—Huachuca Mountains—May 28.
Early dates of spring arrival are: Tampico—Galindo, March 19. Coahuila—Sierra de Guadeloupe, April 20. Arizona—Oracle, April 12. California—Witch Creek, April 10. Washington—Tacoma, April 25.
Late dates of fall departure are: Washington—Edwards, October 19. California—Monterey, October 20. Arizona—Santa Catalina Mountains, September 29. Tamaulipas—Guiaves, October 7.
Early dates of fall arrival are: California—Berkeley, July 9. Arizona—Graham Mountains, July 30. New Mexico—Animas Peak, August 3. Michoacán—Tancitaro, August 16. Guatemala—Tecpán, September 13.
Casual records.—Specimens of the hermit warbler have been collected in the Huachuca Mountains in Arizona on June 16, 1894; at Basin in the Chisos Mountains in Texas on May 3, 1935; and near Cambridge, Minn., on May 3, 1931.
Egg dates.—California: 10 records, May 14 to June 25; 6 records, June 3 to 14, indicating the height of the season.
Washington: 3 records, June 5 to 11 (Harris).