Most female chipmunks trill if chased by predator 10 metres from their burrow, but won't bother if they're 100 metres away. #funsciencefact
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@PhilosophyExp I don't get what is so unusual about that?
@Personalwetness Not unusual, but Burke da Silva et al's 2002 experiment suggested trill is warning rather than mere fear response.
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@PhilosophyExp Um, no sorry it must be me, I just don't get the point at all?Thanks. Twitter will use this to make your timeline better. UndoUndo
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