What primarily drives the pronounced tendency for yellow sac spiders to seek indoor environments as seasons cool?
Answer
Seeking overwintering sites protected from frost
The seasonal shift in yellow sac spider behavior, particularly the increased movement indoors as autumn approaches, is largely motivated by thermal stability. As temperatures begin to drop and frost becomes a threat, these spiders actively search for protected, warmer environments where they can overwinter. These secure locations inside structures provide the consistency needed to survive the cold period, unlike the exposed outdoor vegetation where they were active during warmer months.
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