Geographic distribution of sampled hosts and parasites. Numbers of sequenced specimens for the host (denoted with H) and each parasite taxon (denoted using first letter of the respective generic name) are listed under each island name. Total number of parasite specimens collected on each island are in parentheses. The island colour scheme used here is consistent with those used across all subsequent figures. Mockingbird allopatric species distribution is indicated by the fine dashed lines.