a group of buff-tip caterpillars sitting on a leaf of a hazelnut tree. the insect is also called a phalera bucephala and is yellow

animal antenna arthropod big black brown bucephala buff bufftip bug butterfly cabbage caterpillar climb crawl development eyes frizzy fur garden grow hair infestation insect insecta larva larvae larval leaf lepidoptera lunar made metamorphosis moth natural nature nocturnal notodontidae phalera plague plant species stadium stage tip wild wildlife wing yellow zoology