Sulphur Knapweed Moth Agapeta zoegana

Wingspan: 15-25mm Agapeta zoegana moth
UK flight time: May-Aug Agapeta zoegana moth
Agapeta zoegana has several English common names such as the Sulphur Knapweed moth and other variations including one of the words "sulphur" or "knapweed".
Agapeta zoegana moth
Agapeta zoegana moth
Agapeta zoegana moth
It looks similar to its more common relative Agapeta hamana but is more strongly marked.