JEB -- Church et al. 204 (14): 2491 Figure IG2

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Fig. 2. Experiment 1: the effect of frequency and filter type (UV+ or UV-; see Fig.1) on seed selectivity (ß_red) by zebra finches. Open columns represent a 1:9 ratio (20:180) and filled columns a 9:1 ratio (180:20) of red:white millet seeds. Values are means + S.E.M. (N=8).