Yellow-tail

The yellow-tail, goldtail moth or swan moth (Euproctis similis) is a moth of the family Erebidae. It is distributed throughout Europe to the Urals, then east across the Palearctic to Siberia.[2] It is also found in Sri Lanka.[3]

This species has a wingspan of 35–45 mm, the female usually noticeably larger than the male. All parts of the adults are pure white, apart from a bright yellow tip to the abdomen (larger in the female) and a small black or brown tornal mark on the forewing of the male.