Severn River Flying Squirrel (Pteromys sabrinus) and Rocky Mountain Squirrel (Pteromys alpinus) from the viviparous...

Severn River Flying Squirrel (Pteromys sabrinus) and Rocky Mountain Squirrel (Pteromys alpinus) from the viviparous quadrupeds of North America (1845) illustrated by John Woodhouse Audubon (1812-1862)

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321814