yponomeuta cagnagella caterpillars. larvae of the spindle-d ermine descend on a silk thread. insect pests and nature concept

yponomeuta cagnagella caterpillars larvae infestation pest web leaves branch nature macro insect silk green environment tree wildlife garden closeup biology life cycle outdoors crawling ecosystem entomology natural details summer forest plant habitat vegetation worm background texture wild flora fight with pests agriculture ecology greenery botany leaf animal insects photography