The wood frog is a small, brown frog of northern North American forests. Its ability to survive being frozen makes it one of the toughest amphibians on Earth.
Interesting facts
- Sugars in its cells act like antifreeze, protecting its organs.
- It lives further north than any other North American amphibian.
- A dark mask across its eyes gives it a ‘robber’ look.
- Its breeding calls sound like quacking ducks.
- It breeds in temporary spring pools that have no fish.
- Alaskan wood frogs survive temperatures below −15 °C.
Behaviour
Wood frogs spend most of the year on the forest floor. In early spring, they gather at pools to breed, often while ice is still melting.
Breeding and young
Females lay masses of about 1,000 eggs in shallow pools. Tadpoles develop quickly before the pools dry up.
Threats and conservation
The species is common, although it depends on seasonal pools that are often drained or filled.
Where to see it
- Vernal pools in New England in early spring
- Algonquin Provincial Park, Ontario
- Interior Alaska, near Fairbanks
- Great Smoky Mountains National Park
Status source: IUCN Red List. Profile last reviewed September 2026.
