Figure 1.

Schematic of the fission–fusion dynamics of a representative Bechstein's bat colony and its social structure. (a) Typical roost occupation pattern for the colony (one to three roosting groups, occupying different roosts) on three randomly chosen census days (i, j, k). (b) Underlying social structure (with distinct communities) that may arise from this daily pattern, identified through a weighted network analysis [14–16] based on the roosting associations of the colony members over the entire season (five months). For details of the methods, see the electronic supplementary material.