Daily weather covariance contrasts had intervals across zero in four insect samples in Sweden and Madagascar in 2019-2020

We tested whether the daily pairing of temperature and precipitation within collection windows had a specific link to flying-insect catch. Four models used 5,804 measured catches in Sweden and Madagascar in 2019-2020. Each model compared the current weather covariance slope with the slope for the next equal-length window. Controls included both windows' weather means and variances, trap, seasonal terms and collection duration. Contrast estimates ranged from -0.1186 to +0.1199 on the defined log catch-rate scale. All four adjusted intervals included zero. A negative adjusted interval appeared only in later Sweden when weather variance controls were omitted. This is a short-term association test. One sampling year per country, selected catches, coarse weather, few time blocks and weather dependence limit inference. Catch mixes abundance and flight activity. The package provides aggregate results, a figure, code and exact source hashes. External records stay outside the bundle.

insect biomass · compound weather · daily covariance · observation bias · future weather · regional replication