communal web and eaten leaves from the ermine moth caterpillar, yponomeuta spp

animal branch bush butterfly cagnagella caterpillar caterpillars chrysalis close closeup cocoon collective communal countryside cover crawling cycle damage defoliation eating england entomology environment ermine feed group hanging hedge infest infestation insect larva larvae larval legs life looper macro moth nature nest pest plant silk spindle tree web wildlife wriggling yponomeuta yponomeutidae