Nature Early Bull Frog in NJ

Frogs and Toads

Bullfrogs of Louisiana - HubPages

How a pregnancy test caused a catastrophe for frogs

A new stump-toed frog from the transitional forests of NW Madagascar (Anura, Microhylidae, Cophylinae, Stumpffia)

American Bullfrog (Lithobates catesbeianus) - Species Profile

Looking and listening for bullfrogs

American bullfrog (Lithobates catesbeianus) - JungleDragon

Could someone please help me identify my good friend Froggy Magoo's species? I say bullfrog. He says nothing, ever. : r/frogs

Nature: It's worth the drive to hear the frogs and toads sing, Columnists

Frog Identification: Frog Pictures and Facts - Green Nature

Frogs and Toads of New Jersey

New Mexico Northern Leopard Frog Returns

Outdoors: It's an early spring, for better or worse