---
title: "bald eagle vs mallard — size, speed and bite force"
description: "bald eagle and mallard 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/bald-eagle-vs-mallard/
site: "At One Place"
---

# bald eagle vs mallard

**bald eagle vs mallard: bald eagle leads on 4 of 4 measures**

Measured comparison — not a prediction

The national bird of the United States, recovered from about 400 nesting pairs in 1963 to over 70,000 today. The most common wild duck in the Northern Hemisphere and the ancestor of nearly all domestic ducks. On the measurements below, bald eagle 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

|  | bald eagle | mallard |
| --- | --- | --- |
| Mass | 3–6.3 kg | 0.7–1.6 kg |
| Length | 0.7–1 m | 0.5–0.65 m |
| Top speed | 56–160 km/h | 88 km/h |
| Lifespan | 15–38 yr | 3–29 yr |

## Where each one leads

- Mass: bald eagle is 4.1× heavier.
- Length: bald eagle is 1.5× longer.
- Top speed: bald eagle is 1.8× faster.
- Lifespan: bald eagle is 4.0× 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 bald eagle bigger than a mallard?

bald eagle is heavier — 3–6.3 kg against 0.7–1.6 kg.

### Who would win, a bald eagle or a mallard?

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 bald eagle weigh?](https://atoneplace.net/weight/bald-eagle/)
- [How much does a mallard weigh?](https://atoneplace.net/weight/mallard/)
- [lion vs mallard](https://atoneplace.net/animal-vs/lion-vs-mallard/)
- [domestic cat vs mallard](https://atoneplace.net/animal-vs/domestic-cat-vs-mallard/)
- [American black bear vs bald eagle](https://atoneplace.net/animal-vs/american-black-bear-vs-bald-eagle/)
- [African elephant vs bald eagle](https://atoneplace.net/animal-vs/african-elephant-vs-bald-eagle/)
- [African elephant vs mallard](https://atoneplace.net/animal-vs/african-elephant-vs-mallard/)
- [American bison vs bald eagle](https://atoneplace.net/animal-vs/american-bison-vs-bald-eagle/)
- [blue whale vs mallard](https://atoneplace.net/animal-vs/blue-whale-vs-mallard/)
- [great white shark vs mallard](https://atoneplace.net/animal-vs/great-white-shark-vs-mallard/)
- [American alligator vs bald eagle](https://atoneplace.net/animal-vs/american-alligator-vs-bald-eagle/)
- [bald eagle vs lion](https://atoneplace.net/animal-vs/bald-eagle-vs-lion/)
- [bald eagle vs tiger](https://atoneplace.net/animal-vs/bald-eagle-vs-tiger/)
- [bald eagle vs leopard](https://atoneplace.net/animal-vs/bald-eagle-vs-leopard/)

## Sources

- Smithsonian National Museum of Natural History — Smithsonian Institution (https://naturalhistory.si.edu/)
- Wikidata — Wikimedia Foundation (https://www.wikidata.org/) [CC0 1.0]