Willow Ermine Yponomeuta rorrella: 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

16.005 BF428
Willow Ermine Yponomeuta rorrella

(Hübner, 1796)


Wingspan c. 20mm.

A relatively local species, occurring sporadically in much of England, though with an eastern and coastal bias.

As suggested by the vernacular name, the larvae feed on species of willow, especially white willow (Salix alba) and grey willow (S. cinerea). They feed gregariously on the leaves in a silken web, between May and July.

The adult moths fly in July and August, and in common with others in the group, are readily attracted to light.
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