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Using Hole Sizes to ID the Animal Entering a Structure

Hole sizes only tell us what animals could NOT enter the  building as a raccoon sized hole can be used by a squirrel.

Hole Sizes Rules of thumb

Size of a pencil width think- 3/8" Mouse and bat
Size of a quarter think— 1” rat, chipmunk, flying squirrel, bat  More thorough Inspection
Size of baseball think— tree squirrel 1½”-3” More thorough Inspection
Size of grapefruit think— Raccoon 4”+ More thorough Inspection

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