Rather difficult, but look for subtle signs of activity like frass (wood shavings and bug poop) around the base of the tree, fresh exit holes, woodpecker activity on trees.
Rather difficult, but look for subtle signs of activity like frass (wood shavings and bug poop) around the base of the tree, fresh exit holes, woodpecker activity on trees.
Dr. Tim Perkins
UVM Proctor Maple Research Ctr
http://www.uvm.edu/~pmrc
https://mapleresearch.org
Timothy.Perkins@uvm.edu