Quote:
Originally Posted by GTO
"...When they opened it up, they found yellow home insulatin all bunched up inside where the rodents had made the nest and also all the chewed wires. We kind of figured it was mice or chipmunks because when I opened the front compartment, there were acorn shells inside. They don't need much of a space to get in..."
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1) Mice make nests in enclosed spaces that are made of "minced" leaves, paper, fabric (and wire insulation

).
An acorn-sized hole is "plenty-big" for mice to get in: stuff the hole with steel wool or the coarser
Chore-Girl® scrubbers.
2) Chipmunks keep underground chambers to over-winter in their burrows and
aren't particularly chewers of great determination.
3) Red squirrels make larger, similar, nests in relatively exposed environments, but are composed of "shredded" materials. (Much larger fragments than the nesting materials gathered by mice).
Acorn shells and pine cone fragments are a dead give-away of Red Squirrel habitation.
Red Squirrels "test-cut"
everything with their incisors: new vegetation, chaises, nylon covers, PVC, tree branches, porch flooring—you name it—they are the most destructive critters in this area.
One—in still-another attempt to enter one of our birdhouses—chewed the edges of the aluminum sheet-metal reinforcement I'd installed at the entry!