A. Dispersal behavior across species. iL3s were placed at the center of an agar plate and allowed to crawl freely for 1 hour in the absence of applied sensory stimuli. The percentage of iL3s in the outer zone, defined as the region of the plate outside a 4-cm-diameter circle (right), was determined. H. polygyrus and S. ratti iL3s dispersed to a similar extent, while S. stercoralis iL3s dispersed to a greater extent. ***p<0.001, Kruskal-Wallis test with Dunn’s post-test. n = 9–11 trials for each species and condition. B. Crawling speed across species. H. polygyrus iL3s crawled more slowly than S. ratti and S. stercoralis iL3s. ***p<0.001, one-way ANOVA with Holm-Sidak’s post-test. n = 23–31 iL3s per species. For A-B, graphs show medians and interquartile ranges. C. Nictation frequencies were similar across species (p = 0.65, chi-square test). n = 22–70 iL3s per species. Data for S. ratti and S. stercoralis are from Castelletto et al., 2014 [18].