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The per-day probability of sibling (black lines) and non-sibling pairs (grey lines) of mountain brushtail possums sharing a den during daylight hours in relation to the availability of denning resources (hollow trees). The predictions were derived from GLM model 2 (table 1), with distance set to 60 m, as pairs at this distance were realistically likely to interact. The error bars represent 95% confidence intervals around the predictions.
