Nests & Burrows
To verify an active burrow, wads of paper can be stuffed into the opening or the burrow can be caved in with dirt and rechecked a day or two later.
Mouse
Mice do not typically burrow, instead they create indoor nests of shredded paper, string, and other similar materials. Nests are commonly located in secluded corners, beneath cabinets, at the base of kitchen appliances, and in cluttered garages.
Norway Rat
Norway rat burrows are typically in the ground outside and usually measure about 3 inches in diameter. It is common to find burrows along foundations and underneath debris, low-lying shrubbery, woodpiles, and storage sheds.
Roof Rat
Roof rats typically nest above ground in palm trees, fruit trees, attics, ceiling voids, and along utility lines connected to the exterior of homes.