Extended Data Fig. 1: Changes in preference over time in the Discrimination Ability experiment.

“Level of protection” is the rank order of attack for that stimulus within a session, logit transformed. Higher level of protection indicates that a stimulus was attacked later in the sequence, or not at all. Points show mean and vertical bars show 95% confidence intervals based on the t-distribution. a Training phase. Data show wasp stimuli only; fly data are an almost exact inversion of the data shown. Line shows a sigmoidal curve fitted to the data. N = 828. b Test phase, trends with time. Asymptotic curves fitted to each phenotype. N = 1295 dishes (fly), 558 (75% fly), 553 (50-50), 552 (75% wasp), 1565 (wasp). c Test phase, comparing initial (yellow, sessions 1-3) and asymptotic (black, session 10 onwards, after fitted response reaches within 10% of the asymptote) preferences. Mesembrina axis, N = 191 dishes (initial), 1004 (asymptotic). Chrysotoxum axis, N = 96 (initial), 502 (asymptotic). Syrphus axis, N = 95 (initial), 497 (asymptotic). For images of the stimuli, see Fig. 2 in main text.