Scallop Shell Hydria undulata
Scallop Shell Hydria undulata
Adult • Rixton, Warrington, Cheshire, reared from larva • ©

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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