---
title: "grizzly bear vs ostrich — size, speed and bite force"
description: "grizzly bear and ostrich compared on mass, length, speed, bite force and lifespan — every measure side by side, with why the numbers cannot settle an encounter."
url: https://atoneplace.net/animal-vs/grizzly-bear-vs-ostrich/
site: "At One Place"
---

# grizzly bear vs ostrich

**grizzly bear vs ostrich: ostrich leads on 3 of 4 measures**

Measured comparison — not a prediction

The inland North American brown bear, smaller than coastal populations because it eats less salmon. The largest and fastest bird, laying eggs that weigh about 1.4 kg each. On the measurements below, ostrich leads on more of them — but they do not all point the same way, and the ones that disagree are the interesting part.

## The measurements

|  | grizzly bear | ostrich |
| --- | --- | --- |
| Mass | 130–360 kg | 63–156 kg |
| Length | 1.7–2.4 m | — |
| Height | 0.9–1.1 m | 1.7–2.8 m |
| Top speed | 56 km/h | 60–70 km/h |
| Bite force | 975 psi | — |
| Lifespan | 20–35 yr | 30–50 yr |

## Where each one leads

- Mass: grizzly bear is 2.5× heavier.
- Height: ostrich is 2.4× taller.
- Top speed: ostrich is 1.3× faster.
- Lifespan: ostrich is 1.6× a longer life.

## What this does and does not tell you

These are measured averages with real ranges behind them, and every figure links to its own page. What they cannot do is settle an encounter. Outcomes between animals turn on circumstance — who initiates, whether either is hungry, defending young, injured or cornered, and what the terrain favours. Size and bite force are not decisive on their own, and most of these pairs never meet in the wild in any case, because their ranges do not overlap.

> Every figure here is an average with a substantial spread. Individual animals vary enormously — a large individual of the smaller species routinely exceeds a small individual of the larger one.

## Common questions

### Is a grizzly bear bigger than a ostrich?

grizzly bear is heavier — 130–360 kg against 63–156 kg.

### Who would win, a grizzly bear or a ostrich?

That is not something measurements can settle. The comparison above shows which animal leads on each measure, but an actual encounter depends on circumstance, motivation, health and terrain — and most pairs like this never meet in the wild.

## Related pages

- [How much does a grizzly bear weigh?](https://atoneplace.net/weight/grizzly-bear/)
- [How much does a ostrich weigh?](https://atoneplace.net/weight/ostrich/)
- [lion vs ostrich](https://atoneplace.net/animal-vs/lion-vs-ostrich/)
- [leopard vs ostrich](https://atoneplace.net/animal-vs/leopard-vs-ostrich/)
- [jaguar vs ostrich](https://atoneplace.net/animal-vs/jaguar-vs-ostrich/)
- [cheetah vs grizzly bear](https://atoneplace.net/animal-vs/cheetah-vs-grizzly-bear/)
- [cheetah vs ostrich](https://atoneplace.net/animal-vs/cheetah-vs-ostrich/)
- [cougar vs grizzly bear](https://atoneplace.net/animal-vs/cougar-vs-grizzly-bear/)
- [domestic cat vs grizzly bear](https://atoneplace.net/animal-vs/domestic-cat-vs-grizzly-bear/)
- [domestic cat vs ostrich](https://atoneplace.net/animal-vs/domestic-cat-vs-ostrich/)
- [grizzly bear vs lion](https://atoneplace.net/animal-vs/grizzly-bear-vs-lion/)
- [grizzly bear vs tiger](https://atoneplace.net/animal-vs/grizzly-bear-vs-tiger/)
- [grizzly bear vs leopard](https://atoneplace.net/animal-vs/grizzly-bear-vs-leopard/)
- [grizzly bear vs jaguar](https://atoneplace.net/animal-vs/grizzly-bear-vs-jaguar/)

## Sources

- Smithsonian National Museum of Natural History — Smithsonian Institution (https://naturalhistory.si.edu/)