What is unique about a beaver's eyes?

A beaver has clear eyelids that close over its eyes when submerged.

Learn More:

• Giant Beaver by Buddy Davis, et al.
• Beavers by Denis Dreves
• Aquatic Engineer at Your Service--North American Beaver by Tom Hennigan
• Dam That's Big! by Dr. Jay Wile
• Beavers: God's Natural Builders
• Bucky the Beaver
• Beaver