close-up of a brown inchworm caterpillar of the small engrailed geometer moth, ectropis crepuscularia on a plant stem

arthropod butterfly color ecology ectropis crepuscularia engrailed flora geometridae insect lepidoptera lifestage moth nature animal behavior behaviour biodiversity biology bright brown caterpillar closeup colour dew entomology environment garden geometer green leaves growth hanging inchworm invertebrate landscape larva leaf little macro metamorphosis nocturnal outdoors pest plant sky summer wildlife natural