Images of prey colour morphs and visual backgrounds used in detection experiment.Tetrix subulata pygmy grasshoppers representing black, grey and striped colour morphs (a). Images of T. subulata presented on photographic samples of natural backgrounds from non-burnt environment (b), and from post-fire environments representing 50% burnt substrate (c), and 100% burnt substrate (d). White circles denote the location of the grasshoppers. In the experiment only one grasshopper at the time was presented however in order to illustrate the differences between the colour morph on each background we present all of them in one image. Photo: E. Karpestam.
Karpestam et al. BMC Ecology 2013 13:17 doi:10.1186/1472-6785-13-17