Mandarin Duck vs Red-breasted Merganser
How does the Mandarin Duck compare to the Red-breasted Merganser? 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
- Aix galericulata
- Mergus serrator
- Classification
- Bird
- Bird
- Family
- Anatidae
- Anatidae
- Habitat
- Wooded ponds, slow-moving rivers, and lakes near forests
- Freshwater and coastal wetlands
- Diet
- Omnivore
- Carnivore
- Conservation status
- Least Concern
- Least Concern
- Lifespan
- 6-10 years
- 8-13 years
- Weight
- 0.5-0.7 kg
- 800-1350 g
Mandarin Duck vs Red-breasted Merganser: who would win?

Mandarin Duck
0.5-0.7 kg

Red-breasted Merganser
800-1350 g
Red-breasted Merganser wins moderate confidence
Red-breasted Merganser is substantially heavier (800-1350 g vs 0.5-0.7 kg). 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: Wooded ponds, slow-moving rivers, and lakes near forests vs Freshwater and coastal wetlands.
- Diet: omnivore vs carnivore.
- Weight: 0.5-0.7 kg vs 800-1350 g.
Mandarin Duck vs Red-breasted Merganser: FAQ
Who would win in a fight, a Mandarin Duck or a Red-breasted Merganser?
Red-breasted Merganser wins. Red-breasted Merganser is substantially heavier (800-1350 g vs 0.5-0.7 kg). 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 Mandarin Duck and a Red-breasted Merganser?
Mandarin Duck and Red-breasted Merganser differ in several ways — habitat: wooded ponds, slow-moving rivers, and lakes near forests vs freshwater and coastal wetlands. diet: omnivore vs carnivore. weight: 0.5-0.7 kg vs 800-1350 g.
Do Mandarin Duck and Red-breasted Merganser live in the same habitat?
No — Mandarin Duck lives in wooded ponds, slow-moving rivers, and lakes near forests, while Red-breasted Merganser is found in freshwater and coastal wetlands.
What do Mandarin Duck and Red-breasted Merganser eat?
Mandarin Duck has a omnivore diet, while Red-breasted Merganser has a carnivore diet.
Which is more endangered, the Mandarin Duck or the Red-breasted Merganser?
Mandarin Duck is listed as Least Concern, while Red-breasted Merganser is listed as Least Concern.
How big are Mandarin Duck and Red-breasted Merganser?
Mandarin Duck weighs around 0.5-0.7 kg, while Red-breasted Merganser weighs around 800-1350 g.

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Mandarin Duck

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Red-breasted Merganser





