. . . . . . . . "1907-04-01T00:00:00Z"^^ . . "Regulus calendula" . . "Heteroptera" . . "Beal, F. E. L. 1907. Birds of California in relation to the fruit industry, Part 1. U.S. Department of Agriculture Biological Survey Bulletin, No. 30." . . . . "Allen Hurlbert. 2017. Avian Diet Database." .