1. Hoover, J. P., and M. C. Brittingham. 1993. Regional variation in cowbird parasitism of Wood Thrushes. Wilson Bulletin 105: 228-238. | Hawk Mountain Sanctuary: Learn Visit Join

1. Hoover, J. P., and M. C. Brittingham. 1993. Regional variation in cowbird parasitism of Wood Thrushes. Wilson Bulletin 105: 228-238.