On a remote sandstone outcrop within the Royal National Park, New South Wales, numerous instances were documented involving the aggregation of Brown Tree Snakes Boiga irregularis. Over the period from 2018 to 2023, a total of 8 visits to the site were logged, revealing 3 observed aggregations. Notably, the occurrences of these aggregations appeared to be influenced by seasonality, with each observation being made during late autumn or winter. The peak aggregation count documented involved six adult snakes.

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