poison ivy sawfly - arge humeralis

insect animal invertebrate arthropod moth leaf butterfly pollinator flower wildlife pest beetle wing nature poison ivy sawfly arge humeralis close larvae feeding connecticut entomology biodiversity urushiol toxic green guide research field habitat natural england garden closeup coloration pattern eating pond squantz fairfield foraging control species bug toxin incredible amazing beautiful pretty caterpillar larva phytophagous radicans toxicodendron argidae red pink