Spindle Ermine Yponomeuta cagnagella
Wingspan 19-26 mm.
Although very similar to several other Yponomeuta species, it can be distinguished by the terminal cilia on the forewing which are pure white, as opposed to greyish.
Fairly common throughout Britain except in the far north, occupying chalk or limestone districts.
The foodplant is spindle (Euonymus europaeus), the larvae feeding gregariously in a silken web.