Common Eider vs Wood Duck
How does the Common Eider compare to the Wood Duck? They are both members of the Anatidae family. Below we put their classification, habitat, diet, size, and conservation status side by side — and settle who would win in a fight.


Side-by-side comparison
- Scientific name
- Somateria mollissima
- Aix sponsa
- Classification
- Bird
- Bird
- Family
- Anatidae
- Anatidae
- Habitat
- Coastal marine environments, rocky seashores, and islands in subarctic and arctic regions
- Wooded swamps, marshes, streams, and forested wetlands
- Diet
- Carnivore
- Omnivore
- Conservation status
- Least Concern
- Least Concern
- Lifespan
- 10-20 years
- 3-5 years in the wild
- Weight
- 1.2–2.8 kg
- 454–862 grams
Common Eider vs Wood Duck: who would win?

Common Eider
1.2–2.8 kg

Wood Duck
454–862 grams
Common Eider wins high confidence
Common Eider is substantially heavier (1.2–2.8 kg vs 454–862 grams). In a physical confrontation that size and power advantage is usually decisive. In the wild these two rarely (if ever) meet — this is a what-if based on the size and diet we have on record, not a prediction.
Similarities
- Both are birds.
- Both belong to the Anatidae family.
- Both are listed as Least Concern.
Differences
- Habitat: Coastal marine environments, rocky seashores, and islands in subarctic and arctic regions vs Wooded swamps, marshes, streams, and forested wetlands.
- Diet: carnivore vs omnivore.
- Weight: 1.2–2.8 kg vs 454–862 grams.
Common Eider vs Wood Duck: FAQ
Who would win in a fight, a Common Eider or a Wood Duck?
Common Eider wins. Common Eider is substantially heavier (1.2–2.8 kg vs 454–862 grams). In a physical confrontation that size and power advantage is usually decisive. In the wild these two rarely (if ever) meet — this is a what-if based on the size and diet we have on record, not a prediction.
What is the difference between a Common Eider and a Wood Duck?
Common Eider and Wood Duck differ in several ways — habitat: coastal marine environments, rocky seashores, and islands in subarctic and arctic regions vs wooded swamps, marshes, streams, and forested wetlands. diet: carnivore vs omnivore. weight: 1.2–2.8 kg vs 454–862 grams.
Do Common Eider and Wood Duck live in the same habitat?
No — Common Eider lives in coastal marine environments, rocky seashores, and islands in subarctic and arctic regions, while Wood Duck is found in wooded swamps, marshes, streams, and forested wetlands.
What do Common Eider and Wood Duck eat?
Common Eider has a carnivore diet, while Wood Duck has a omnivore diet.
Which is more endangered, the Common Eider or the Wood Duck?
Common Eider is listed as Least Concern, while Wood Duck is listed as Least Concern.
How big are Common Eider and Wood Duck?
Common Eider weighs around 1.2–2.8 kg, while Wood Duck weighs around 454–862 grams.

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Common Eider

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Wood Duck





