Follow an amphibian's life cycle from an underwater egg to a land-roving organism
Follow an amphibian's life cycle from an underwater egg to a land-roving organism
General characteristics of amphibians.
Encyclopædia Britannica, Inc.
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Encyclopædia Britannica, Inc.General characteristics of amphibians.
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© Open University (A Britannica Publishing Partner)What's the chemistry of hibernation?
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Encyclopædia Britannica, Inc.The red salamander belongs to a family of lungless salamanders that breathe only through their moist skin.
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Encyclopædia Britannica, Inc.Learn about how North American toads leap in this slow-motion video.
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Encyclopædia Britannica, Inc.Real-time and slow-motion footage of a toad seizing prey with its tongue.
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Encyclopædia Britannica, Inc.The life cycle of a North American toad.
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© American Chemical Society (A Britannica Publishing Partner)Fighting a killer frog fungus.
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Encyclopædia Britannica, Inc.Caecilian moving over soil.
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Encyclopædia Britannica, Inc.Learn about tree frogs of American tropical rainforests. Adhesive disks on their feet help them walk on slippery leaves without sliding, and they lay eggs; within the egg mass, embryos can be seen twitching. The tree frog with a translucent underside is called a glass frog (family Centrolenidae). (42 sec; 7 MB)
News •
Unethical photographers have become a threat to these tiny, starlit frogs
• Dec. 18, 2025, 1:35 AM ET (CNN)
Transcript
[Sound of a frog]
The frog and toad are in a group called amphibians. They also come from eggs--but eggs laid in the water. When the egg hatches, the amphibian still lives in water. It is only later it grows into an animal that can live on land, although it may still live near the water.
The frog and toad are in a group called amphibians. They also come from eggs--but eggs laid in the water. When the egg hatches, the amphibian still lives in water. It is only later it grows into an animal that can live on land, although it may still live near the water.
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