Cryptic Fern Horisme radicaria

Probably a recent colonist, though overlooked in the UK for nearly 30 years (at least) before it was eventually recognised in 2019. It hasn't yet been confirmed to occur in Norfolk though a strong contender was photographed (but sadly not retained for genital examination) in 2020. Most records are from the eastern half of Kent and along the south coast west to Hampshire.

I caught this while staying in Kent. I suspected its identity from its external appearance but the genitalia confirmed it.

male Cryptic Fern Horisme radicaria showing genitalia including left and right saccular projections, Cooper Street Drove near Ash (Kent, UK), 3rd May 2026