Birds:
* Woodpeckers: Many woodpecker species excavate cavities in snags for nesting.
* Owls: Some owls, like the Barred Owl, use existing cavities in snags for nesting.
* Hawks: Red-tailed Hawks sometimes build nests on large snags.
* Other birds: Nuthatches, chickadees, and bluebirds are among other birds that might nest in snags.
Mammals:
* Squirrels: Tree squirrels often use snags for nesting and denning.
* Bats: Bats might roost in cavities within snags.
* Other mammals: Weasels, raccoons, and other small mammals may use snags for shelter.
Reptiles:
* Snakes: Some snake species, like the garter snake, may use snags for shelter.
* Lizards: Lizards may use snags for basking and hiding.
Insects:
* Beetles: Some beetle species, like the longhorn beetle, bore into snags and lay their eggs.
* Wasps: Some wasps might use snags for nesting.
This list is not exhaustive, and the specific animals that nest in snags will depend on the type of snag, its location, and the local ecosystem.