Hawks Select Odd Prey

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Science  30 May 1975:
Vol. 188, Issue 4191, pp. 953-954
DOI: 10.1126/science.188.4191.953


Hawks were offered one color of mouse for ten consecutive captures and then a choice between that and another color. The birds usually selected the odd, or unusual, color. This behavior is probably adaptive because odd prey in nature would be unfit.