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  1. Polar Bear ( Ursus maritimus ) Fact Sheet: Taxonomy & History

  2. ADW: Ursus maritimus: CLASSIFICATION

  3. Polar bear - Wikipedia

  4. Polar bear | Description, Habitat, & Facts | Britannica

  5. All About Polar Bears - Scientific Classification | United Parks

  6. Polar Bear Fact Sheet | Blog | Nature - PBS

  7. Polar Bear - A-Z Animals

  8. Polar Bear (Ursus maritimus) | U.S. Fish & Wildlife Service

  9. Ursus maritimus (Polar bear) - International Association for Bear ...

  10. Bears of the Last Frontier | Polar Bear Fact Sheet - PBS