Figure S1. Map of experimental sites in Gatineau Park, Gatineau, QC.

Figure S2. Artificial prey targets used in the experiment. A: high crypsis, B: low crypsis, C: high unpalatability, D: low unpalatability, E: control. In sites 3 and 4, the colours of the low and high unpalatablility targets were reversed.

Figure S3. Mean % reflectance by wavelength from the bark of 7 maple trees (Acer saccharum), as well as the two cryptic prey colours. Reflectance curves were obtained by averaging 10 measurements from each sample.

Figure S4. Cumulative survival probability for each prey type, separated by trial (rows) and predation measure (columns). There were significant differences between trials for all three predation measures.

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