well i guess i am a little late because they are here...the web worms that is! i am fortunate to not have many in my yard, but, wow: check out my neighbors tree: engulfed! the fall web worm creates the characteristic webbed nests on tree limbs of a wide variety of hardwoods in the late summer and fall: it has been recorded in 636 species. this worm is mainly an aesthetic pest and is not believed to harm otherwise healthy trees. the moth is native to north america, with a range from canada to mexico, and is one of the few insect pests introduced from north america into other continents: sorry, people.