These caterpillars (image below) are feeding on staghorn sumac. Most of the plant is untouched, but a few leaflet clusters have dense congregations of early instar caterpillars - not sure of the species yet. The mosquitoes are swarming, especially near and under any foliage, making prolonged observations difficult.
Early this morning we were awakened by coyotes across the road on the Knapp's View property owned by the town of Chester - about 4:30AM they were enthusiastically yapping, yipping and howling hysterically!