Cowbird (Molothrus spp.) Ecology: A Review of Factors Influencing Distribution and Abundance of Cowbirds across Spatial Scales

Department of Biology, Villanova University, Villanova, Pennsylvania 19085, USA; Department of Ecology, Evolution and Marine Biology, University of California Santa Barbara, Santa Barbara, California 93106, USA; Department of Ecology and Evolutionary Biology, Princeton University, Princeton, New Jersey 08544, USA; Department of Wildlife Ecology, University of Wisconsin, 1630 Linden Drive, Madison, Wisconsin 53706, USA; Division of Biology, Kansas State University, 232 Ackert Hall, Manha an, Kansas 66506, USA; School of Forest Resources, Penn State University, 2C Ferguson Building, University Park, Pennsylvania 16802, USA; and Florida Museum of Natural History, University of Florida, P.O. Box 117800, Gainesville, Florida 32611, USA