Bog Grass Moth recorded at Welsh nature reserve for first time

Conservationists in Wales have found a rare moth species at Cors Geirch National Nature Reserve for the first time. On 30 September 2026, moth experts Steve Palin and Charles Aron identified 19 Bog Grass Moths at the site in Gwynedd. The team set three traps overnight and caught 446 moths from 91 different species in total. The Bog Grass Moth caterpillars eat wet sedges, which grow well in the reserve's calcium-rich water. The survey was part of Natur am Byth, a conservation programme that includes RSPB Cymru. Conservationists say the discovery shows that habitat management at the reserve is working well. Cors Geirch also supports other rare creatures, including the Six-spotted Cranefly and the Black Night-runner Ground Beetle.