Why do leopard frogs come in two colors?

The persistence of two colors everywhere suggests a balance of evolutionary forces

Northern Leopard Frog Facts for Kids - NatureMapping

Southern Leopard Frog (Lithobates sphenocephalus) - HERPING VIRGINIA

Pickerel Frog

Northern leopard frog have fewer places to sing, meet and breed tadpoles from a 6,000-egg jelly - Cambridge Day

Northern Leopard Frog The Canadian Encyclopedia

Amphibian - Little Bighorn Battlefield National Monument (U.S. National Park Service)

Northern Leopard Frog Care Sheet - Reptiles Magazine

Tiger whiptail lizards come in many forms

Northern Leopard Frog (Rana pipiens) - Indiana Herp Atlas

Northern Leopard Frog (Rana pipiens) – Cowling Arboretum – Carleton College

Ohio's 15 species of frogs and toads at a glance