This video is called ORANGE UNDERWING or LESSER YELLOW UNDERWING or YELLOW UNDERWING.
The Dutch entomologists of the Vlinderstichting report that during recent weeks many butterflies migrated across the North Sea.
Most of them were small tortoiseshell and small white butterflies.
A lesser yellow underwing moth tried to board a ship to rest. It nearly drowned; but someone aboard the ship saved it.
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