Spindle small ermine
Yponomeuta cagnagella
An informal survey of the plant and animal life living in or visiting the grounds of Pointfield, Kelso since 2015
Butterflies and moths: Yponomeutidae
Nests of distinctive grey caterpillars with black spots in the spindle tree (Euonymous europaeus). Well developed caterpillars seen in three nests at the end of May. For adult see here.