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  3. Goosander

One of the 2 mergansers on WAnimals

Birds · Anseriformes · Anatidae

Goosander

Mergus merganser

Least Concern

The species is abundant and widely distributed; it faces no significant short-term risk.

Spotted something wrong?

Its long, narrow bill has saw-like serrated edges — hence the nickname "sawbill" — a unique adaptation for gripping slippery fish. It nests in tree holes.

Weight

900 g – 2.1 kg

Size

58 cm – 72 cm

Life expectancy

8 years

Diet

Carnivore

Feeds mainly on other animals.

Activity

Diurnal

Active mainly during the day.

Social structure

In pairs

Usually lives in pairs, sometimes for life.

Temperate forestFreshwater
47countries86parks42same family

Fun facts

  • Its serrated bill earns it the nickname "sawbill".
  • Several females may share the same tree to breed, forming mixed broods of more than 40 ducklings.
  • Its ducklings jump straight from the tree hole to the water or the ground after hatching.

Life cycle and biology

Skeleton type
Vertebrate - pneumatised bony skeleton (bird)
Habitat and environment
Clear rivers and lakes surrounded by woodland in Europe, Asia and North America, wintering on estuaries and large lakes
Birth weight
46.2 grams
Size at birth
Precocial, able to jump from the tree hollow where it hatches straight into the water or onto the ground soon afterwards
Sexual maturity
2 years
Gestation / incubation
28-35 days
Litter / clutch size
6 to 17 eggs per clutch

Sources consulted: AnAge (genomics.senescence.info) · NHPBS NatureWorks · Animal Diversity Web · BioDB · Wikipedia (Common merganser) · Bird Database · Audubon Field Guide · Animalia.bio

Where to find it

Best time: From November to March on rivers, lakes and reservoirs in Europe and North America, when the winterers arrive from the north.

Loading map…

Where to see it

Parks and dive sites where this species has been documented — showing 10 of 86.

Related species

Other species in the catalogue with the most in common with Goosander — same habitat, park, country, tags or family.

Same taxonomic family
Same taxonomic family
Same taxonomic family
Same taxonomic family
Same taxonomic family
Same taxonomic family

Keep exploring

Based on what we already know about goosander.

Share an experience, a fun fact or a tip for seeing the goosander.
See full glossary
This page in other languages: Español · Deutsch · Français · Português · Italiano

The pins mark the parks where its presence is documented.

See its range on the interactive map→
SarekSweden
PadjelantaSweden
JotunheimenNorway
HardangerviddaNorway
Pallas-YllästunturiFinland
Urho KekkonenFinland
Lake DistrictUnited Kingdom
CairngormsUnited Kingdom
Snowdonia (Eryri)United Kingdom
KillarneyIreland
See all 86 parks
Least Concern

Whooper Swan

Cygnus cygnus

Mute SwanLeast Concern

Mute Swan

Cygnus olor

Red-breasted MerganserLeast Concern

Red-breasted Merganser

Mergus serrator

Least Concern

Common Goldeneye

Bucephala clangula

Least Concern

Wood Duck

Aix sponsa

Least Concern

Gadwall

Mareca strepera

CountriesFinland
ParksSarekSweden
TagsCarnivore
Carnivore
Diurnal
In pairs
Bird
Temperate forest
Freshwater

Europe40

Asia5

North America2

Finland
Sweden
Norway
United Kingdom
Canada
Estonia
Albania
Andorra
Austria
Belarus
Belgium
Bosnia and Herzegovina
Bulgaria
Croatia
Czechia
Denmark
Estonia
Finland
France
Germany
Greece
Hungary
Ireland
Italy
Kosovo
Latvia
Liechtenstein
Lithuania
Luxembourg
Moldova
Montenegro
Netherlands
North Macedonia
Norway
Poland
Portugal
Romania
San Marino
Serbia
Slovakia
Slovenia
Spain
Sweden
Switzerland
Ukraine
United Kingdom
Armenia
Azerbaijan
Georgia
Russia
Türkiye
Canada
United States