References

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Hauber, M.E. and Russo, S.A. 2000. Perch proximity correlates with higher rates of cowbird parasitism of ground nesting song sparrows. Wilson Bull. 112: 150-153.

Kilner, R. M., J. R. Madden, and M.E. Hauber. 2004. Brood parasitic cowbird nestlings use host young to procure resources. Science 305:877-879.

Lowther, P. E. 1993. Brown-headed Cowbird, Molothrus ater. - In: Poole, A. and Gill, F. (eds), The Birds of North America, no. 47. Academy of Natural Sciences and American Ornithologists’ Union.

Rothstein, S.I., J. Verner, and E. Stevens. 1984. Radio-tracking confirms a unique diurnal pattern of spatial occurrence in the parasitic brown-headed cowbird. Ecology 65:77-88.

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