Treble Brown Spot Idaea trigeminata

Treble Brown Spot Moth
Treble Brown Spot Moth
Treble Brown Spot Moth
The Treble Brown Spot is one of the "wave" family of moths. Wingspan 23-25mm; UK flight May-Jul.
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Single-dotted Wave Idaea dimidiata

Single-dotted Wave Moth
Single-dotted Wave Moth
Single-dotted Wave Moth
The Single-dotted Wave is a totally misnamed wave. Wingspan 13-18mm; UK flight Jun-Aug. Some Single-dotted Waves look very similar to Treble Brown Spots.