Banks, R. C., R. W. McDiarmid, and A. L. Gardner 1987-01-01. Resource Publication, no. 166. United States Department of the Interior Fish and Wildlife Service. Washington, D.C., USA. 79. . .
Dickinson, Edward C., ed. 2003-01-01. The Howard and Moore Complete Checklist of the Birds of the World, 3rd edition. Princeton University Press. Princeton, New Jersey, USA. 1039. 0-691-11701-2. .
Banks, R. C., R. W. McDiarmid, A. L. Gardner, and W. C. Starnes 2003-12-31. Checklist of Vertebrates of the United States, the U.S. Territories, and Canada. . . . . As-yet (2003) unpublished manuscript from 1998.