This is a web-like cocoon containing larvae of some species of Moth (possibly a species of Webworm Moths, but I don't know enough about them). Found several feet off the ground in a tree along the paved bike path that connects to one that goes around Centerville Lake (west of the pond between Centerville Road and Beaver Pond Way), in Centerville, MN.
I think this is an American Plum tree. Found along the paved bike path that connects to one that goes around Centerville Lake (west of Beaver Pond Way, approaching the SE part of the loop trail), in Centerville, MN.
Common Buckthorn from the DHMS woods.