American Bullfrog | National Geographic

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• American Bullfrog - NC Wildlife

• American Bullfrog - Wikipedia

• African Bullfrog - Wikipedia

• American Bullfrogs: The Largest Frogs In North America

• California's Invaders: American Bullfrog

• Bullfrog | Amphibian - Britannica

• Discover The 10 Largest Bullfrogs In The World - AZ Animals

• American Bullfrog Facts - NatureMapping Foundation

• American Bullfrog - BioKIDS

• [PDF] Fact Sheet - American Bullfrog - Water Education Foundation

• Bullfrog (Lithobates Catesbeianus) - Wisconsin DNR

• Water We Talking About? How Big Can A Bullfrog Get?

• North American Bullfrog Facts And Information - At