Adjusted rain timing intervals were below zero in one of four UK moth samples in 1993-2015

We tested whether a 0-to-5-mm rain contrast for recorded moth catch was more negative on the trap night than seven days before and after. Four separate conditional Poisson models used 28,184 nights at seven English and two Scottish sites in 1993-2003 and 2004-2015. Models controlled trap week and weather on all three dates. Estimates were -0.122, -0.113, -0.328 and -0.043 on the log expected catch scale. Only early Scotland had an interval below zero after correction for four tests. That interval stayed below zero with other date offsets, shorter groups and positive catches only. Both single-site Scottish intervals included zero. Later samples had no explicit zero catches. Future rain had a positive marginal association in early Scotland. Record selection, shared weather, few year groups and rapid biological changes limit interpretation. The data do not establish a common rain timing pattern or identify capture bias. No pollution effect or long-term climate effect was tested. The package supplies code, aggregate results, a figure, input hashes and a verified reproduction route; source records remain external.