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Where do flying squirrels make their dens and nests?

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Flying squirrels, which are members of the tribe Pteromyini, typically den in tree cavities, grottoes, or rock crevices found on cliffs and cave ledges.1

In addition to these natural shelters, some species construct globular nests high in trees, specifically where branches join the trunk. These nests are crafted from a variety of materials, including:1

  • Leaves1
  • Shredded bark1
  • Mosses1
  • Lichens1

While most species remain primarily in the trees, North American flying squirrels are known to descend to the ground to forage and bury nuts.1