Scallop Shell Hydria undulata - Distribution map

Please note that the NBN Gateway map service has been terminated as of 1 April 2017.

As soon as a replacement map service is available, distribution maps will hopefully appear here again.

In the meantime, you can get some idea of distribution from the NBN Atlas website.

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70.121 BF1789

Scallop Shell Hydria undulata

(Linnaeus, 1758)

Wingspan 25-30 mm.

A highly distinctive moth, unlikely to be confused with any other British species.

It prefers open woodland with an undergrowth of bilberry, and marshy areas, and flies in a single generation from June to July.

It occurs locally over a large part of the British Isles as far north as southern Scotland.

The larvae spin together leaves at the tips of shoots of sallow (Salix), and bilberry (Vaccinium myrtillus).
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