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1710s1 ~ Weaver's Wave ~ Idaea contiguaria
UK Status

Resident. Nat. Scarce A

Montgomeryshire Status

This 'Nationally Scarce A' species, which is only found in north Wales, has only been recorded once at Pistyll Rhaeadr on the northern edge of the county in 2005.

Wingspan :  M & F, 20-21mm.

Confusion species

Mullein Wave.

Flight time (Montgomeryshire)


Heather clad hillsides.


Mostly heather, but has also been found on crowberry and navelwort.

Lifestage data

Overwinters as a part grown larva amongst the foodplant. Larva August-May. Pupates in a fragile cocoon.
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Montgomeryshire photos

Photo by DC, July 2005, Pistyll Rhaeadr