Webworm on Box Elder (Hyphantria cunea) Child Height

This is the north side of Wagner Rd near the dead end.  This is probably the fall webworm.  The tent caterpillars tend to be in the spring.  Here the web is on the end of a hardwood deciduous tree branch.  The caterpillars are marked with yellow not easily seen in the photo, will go back with magnification.  The webworm is supposed to be mainly a cosmetic problem,not a threat to a healthy tree.

This is a native to North America which has spread to Asia and Europe, reversing the usual trend. The winter cocoon will produce a white moth in the spring.  Bagworms form a more solid woody case made of silk and local materials.

This stage is said to last about six weeks, and is low enough to the ground to easily see the movement of the caterpillars.  The photos show the end of the branch location at a distance and then a view of the caterpillars magnified, you have to be there for the motion.