Abstract
both brightly coloured and distasteful. In addition, there will have been slight differences in shape as well as considerable differences in strength of the integument between the two prey types. The authors argue that, because the great tits were able to distinguish between mealworms and swallowtail larvae, the latter qualify as being aposematic. The swallowtail larvae may, indeed, have been aposematic but the evidence presented does not demonstrate that. The basis for discrimination may not have been colour, it could have been shape. The reason for avoidance may not have been distaste, it could have been the tough integument. While we accept the importance of the experiments performed by Jdrvi et al. we emphasize the need for more detailed experiments that allow us to distinguish between some of the processes outlined above.
Published Version
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