New Species of Glass Frog Is So Transparent You Can See Its Heart

What makes glass frogs transparent? The secret is in their blood.

Glass frog with translucent skin found in Costa Rica - BBC News

Chytrid Fungus and Disappearing Frogs

It's what's inside that counts.

FAQ about glass frogs

5 Vanishing Frogs

This Glass Frog's Heart Is Visible Through Its Skin

You Can See the Living Heart of This 'Glass Frog

They discover two new glass frogs whose hearts are seen beating

How See-Through Glass Frogs Hide Their Red Blood From Predators

5 Vanishing Frogs

Watch: See-through glass frog species under threat of extinction

Wildlife Wednesday: ian Frog – indahs: dive, travel

Two New Species Of See-through Frog Named In Ecuador

A transparent frog hides its red blood cells while sleeping : NPR