This 19 May 2016 video shows a mass of small tortoiseshell caterpillars.
They are moving, in self-defence against enemies like parasitic wasps.
Lieke Kragt from the Netherlands made this video.
This 19 May 2016 video shows a mass of small tortoiseshell caterpillars.
They are moving, in self-defence against enemies like parasitic wasps.
Lieke Kragt from the Netherlands made this video.
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