Eastern Tent Caterpillar Nest on Walnut Tree

eastern tent caterpillar webworm nest bagworms web cocoon moth malacosoma americanum insect invasive colony pupal bugs mottephobia thread defoliation silken tree environmental nature caterpillar pest trees forest larva creepy crop damage damage silk fall canadian urticate aposematic leaves communal destruction walnut distasteful toxic natural light irritant white striped