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Villkäpa (Villkäpp)

Probably hele-villkäpp, the pale tussock moth, Calliteara pudibunda. Pudibunda, or modest, shy, perhaps for the habit of the caterpillar (once known in hop-picking times as the ‘hop-dog’) curling up into a (protective) circle/ball? Part of a lepidopteran group. See also Öölase.