Wildlifeof Thailand
Red-breasted Merganser
Anatidae
Photo: (c) Thomas Galewski, some rights reserved (CC BY) · CC-BY (May be cropped or resized)
Mergus serrator
Basic stats
Diet
Fish and aquatic invertebrates
Habitat
Northern lakes and rivers; coasts in winter
Range
Northern Eurasia and North America
Size
51–62cm
Wingspan
70–86cm
The red-breasted merganser is a slim diving duck with a narrow red bill and shaggy crest. Breeding males have a dark green head, white neck collar and rusty speckled breast; females are grey with a reddish-brown head. It breeds beside northern lakes and rivers and winters mainly on coasts, pursuing fish and aquatic invertebrates underwater with its serrated bill (Wikipedia, general species account). It is Nationally Least Concern (Thailand Red Data 2025).
Quick answers
- What does the Red-breasted Merganser eat?
- Fish and aquatic invertebrates
- What habitat does the Red-breasted Merganser live in?
- Northern lakes and rivers; coasts in winter
- Where is the Red-breasted Merganser found?
- Northern Eurasia and North America
- How big is the Red-breasted Merganser?
- 51–62cm
- What is the wingspan of the Red-breasted Merganser?
- 70–86cm