JEB -- Church et al. 204 (14): 2491 Figure IG3

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Fig. 3. Experiment 2: the effect of seed frequency and filter type (ultraviolet-blocking (UV-), short-wavelength blocking (SW-), medium-wavelength blocking (MW-) or long-wavelength blocking (LW-) on selectivity (ß_red) by zebra finches. As in Fig.2, 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).