By A Mystery Man Writer
Frogs become transparent by 'hiding' blood in their liver during
What is a Frog?, Frog Facts for Kids
Scientists discover frog that can change its skin's texture
Frog Definition, Species, Habitat, Classification, & Facts
Under a Flashlight, a Eureka Moment About Frogs - The New York Times
You Can See the Living Heart of This 'Glass Frog
Glass act: Scientists reveal secrets of frog transparency
Glass Frog Animal Facts - A-Z Animals
Photos of new frogs discovered in Colombia
Listening for the amphibian apocalypse
What makes glass frogs transparent? The secret is in their blood.
Glass act: Scientists reveal secrets of frog transparency
What is a Frog?, Frog Facts for Kids
See-through frog has heart you can see beating through its chest