brown pine looper caterpillar imitating a twig crawls up the pine tree in forest

arpentator bark beggare brown bugology camouflage camouflaging cankerworm carpet caterpillar color conifer coniferous crawl depredator ecology entomology environment fauna flora forest geometer geometrid geometridae hexapod hide inchworm insect insectology insectpest landsurveyor larva life looper masking measuring moth nature notchwing orange outdoor pest pine pinetree plant softwood stick surveyor tree twig underwing walking wild worm