grass moth, acronicta rumicis larvae, caterpillar climbing on stem with green background, front view. macro animal

acronicta acronictinae animal arthropod background biology brown butterfly camouflage caterpillar climbing closeup detail ecosystem entomology environment fauna fluffy furry grass growth hair hairy insect insecta insects invertebrate knot larvae lepidoptera macro moth natural nature noctuidae nymph one pest protective red rumicis small stem texture toxic vulnerability white wild wildlife