FIGURE 4.

Pre‐WNS immigration rates show dynamic populations during winter. Panels show bat species and colours indicate different bat populations. Lines show the fitted relationship between log₁₀ early winter counts of bats and the rate of change in the same population over winter. Model diagnostics are shown in Figure S2 and Appendix S1. Despite cold (<5°C) temperatures, there was detectable immigration and emigration among hibernation sites, consistent with bats moving from larger to smaller colonies over winter