Why do brown-headed cowbirds, Molothrus ater, attack eggs in host nests?

Schaeff, Catherine Margaret.2009-03-202009-03-2019891989Source: Masters Abstracts International, Volume: 40-07, page: .9780315564527http://hdl.handle.net/10393/5659http://dx.doi.org/10.20381/ruor-10862Biology, General.Why do brown-headed cowbirds, Molothrus ater, attack eggs in host nests?Thesis