Do you clear any brush on your property?
I think brush makes a fine complement to the porcupines. Each tree has a fluffy end and a dense end.
Further, the trees are variable. Each fish species/size class/etc. can probably find a niche in the tree (or brush pile) that they consider the ideal cover.
[I am currently clearing Honey Locust on my property right now. If you invent a means to send them via PM, I will send you as many as you want!
]
