SPECTACULAR SCIENCE: Glass Frog Heartbeat

These extraordinary tree-dwelling frogs live mostly in tropical areas of Central and South America. Most are tiny, ranging in size from 3 cm to 7.5 cm. They are usually green in colour, except for their undersides, where the skin is transparent. This makes it easy to see their internal organs, including their beating hearts!


Unlike tree frogs, glass frogs have forward-facing eyes. They have excellent eyesight for hunting prey at night.

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