🐊 American alligator vs Grizzly bear 🐻
The American alligator is about one and a half times as long as the grizzly bear. The American alligator weighs about twice as much as the grizzly bear.
Getting the animals ready…
| Row | 🐊 American alligator | 🐻 Grizzly bear |
|---|---|---|
| Size The American alligator is about one and a half times as long as the grizzly bear. | 8 to 11 ft2.4 to 3.4 m1 | 5 to 7 ft1.5 to 2.1 m2 |
| Top speed We don't have a checked number for the American alligator yet. | no checked number yet | 35 mph56 km/h3 |
| Weight The American alligator weighs about twice as much as the grizzly bear. | 1,000 lb454 kg4 | 243 to 661 lb110 to 300 kg5 |
| Lives The American alligator usually lives about twice as long as the grizzly bear. | 50 years50 years1 | 25 years25 years5 |
| Eats The American alligator eats meat; the grizzly bear eats plants and animals. | fish, turtles, frogs, snakes and birds | roots, berries, grasses, nuts, fish, insects and meat |
| Lives in They live in different kinds of places, so they would hardly ever meet. | swamps, marshes, rivers and lakes of the southeastern United States | the mountains and forests of western North America, from Alaska to Wyoming |
Which one? American alligator or grizzly bear
🏁 Who would win the race?
We don't have a checked top speed for the American alligator yet, so there is no race.
We only race. Real animals mostly avoid each other. A race is the only fair contest: who reaches the tree first, by top speed. Our face-off books compare real numbers, and nobody gets hurt.
10 things to know about American alligator vs Grizzly bear
- The American alligator: It digs pools in the swamp that help other animals in dry weather.
- The grizzly bear: A big brown bear with a shoulder hump, strong enough to dig.
- They are different kinds of animal. The American alligator is a reptile, so it has scaly skin; the grizzly bear is a mammal, so it breathes air with lungs and feeds its babies milk.
- The American alligator is about one and a half times as long as the grizzly bear: 1 against 2.
- The American alligator weighs about twice as much as the grizzly bear. That is 4 for the American alligator and 5 for the grizzly bear.
- The American alligator usually lives about twice as long as the grizzly bear. Usual lifespans: 1 for the American alligator and 5 for the grizzly bear.
- The American alligator eats fish, turtles, frogs, snakes and birds. The grizzly bear eats roots, berries, grasses, nuts, fish, insects and meat.
- The American alligator lives in swamps, marshes, rivers and lakes of the southeastern United States. The grizzly bear lives in the mountains and forests of western North America, from Alaska to Wyoming. They live in different kinds of places, so they would hardly ever meet.
- The American alligator: doing fine (Least Concern on the IUCN Red List). 6
- The grizzly bear: doing fine (Least Concern on the IUCN Red List). 7
Wow facts
🐊 American alligator
- Baby alligators chirp from inside their eggs.
- The warmth of the nest decides if hatchlings are males or females.
- An alligator's snout is wide and rounded, like a U.
🐻 Grizzly bear
- The hump on its back is a big shoulder muscle for digging.
- Its cubs are born tiny, in the middle of winter.
- Many grizzlies eat more plants than meat.
Questions kids ask about American alligator and Grizzly bear
Which is bigger, American alligator or grizzly bear?
The American alligator is about one and a half times as long as the grizzly bear: 1 against 2.
Which is heavier, American alligator or grizzly bear?
The American alligator weighs about twice as much as the grizzly bear. That is 4 for the American alligator and 5 for the grizzly bear.
Which lives longer, American alligator or grizzly bear?
The American alligator usually lives about twice as long as the grizzly bear. Usual lifespans: 1 for the American alligator and 5 for the grizzly bear.
What do American alligator and grizzly bear eat?
The American alligator eats fish, turtles, frogs, snakes and birds. The grizzly bear eats roots, berries, grasses, nuts, fish, insects and meat.
Where do American alligator and grizzly bear live?
The American alligator lives in swamps, marshes, rivers and lakes of the southeastern United States. The grizzly bear lives in the mountains and forests of western North America, from Alaska to Wyoming. They live in different kinds of places, so they would hardly ever meet.
Who would win, American alligator or grizzly bear?
We never show fights, because a fight is not a fair way to compare animals. They live in different kinds of places, so they would hardly ever meet. What we can compare is how big, how heavy, how fast, how long they live and what they eat, as above.
📤 Share this pair
The link carries only the two animals’ names: peabody.kids/animals/compare/american-alligator-vs-grizzly-bear
Where these numbers come from
- National Park Service, Gulf Islands, checked 30 October 2026.
- National Park Service, Bears (brown bears), checked 30 October 2026.
- National Park Service, Glacier, checked 30 October 2026.
- Smithsonian's National Zoo, checked 30 October 2026.
- US Fish and Wildlife Service (grizzly bear species profile), checked 30 October 2026.
- Wikidata, from the IUCN Red List, checked 30 October 2026.
- Wikidata, from the IUCN Red List, checked 30 October 2026.