Grass Eggar Lasiocampa trifolii: 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.

View the NBN Atlas Map

66.006 BF1636
Grass Eggar Lasiocampa trifolii

([Denis & Schiffermüller], 1775)


Wingspan 40-55 mm.

In common with many of the Lasiocampidae, the females of this species are larger than the males, though otherwise similar in appearance.

The hairy caterpillars feed on a variety of grasses and plants.

It occurs rather locally, on coastal sand hills in the north-west and south-west of Britain, and flies at night in August and September, when it is attracted to light.
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