Greylag Goose

Anser anser

Genus · Grey Geese Family · Ducks, Geese, and Swans
Observation tips Difficulty: EASY
Best time
🕒 Any
Activity
☀️ Diurnal
Best months
1
2
3
4
5
6
7
8
9
10
11
12
Observation habitat
FarmlandLake wetlands

Widespread on park lakes and gravel pits year-round. In flight, look for the very pale, almost white leading edge of the wing.

Greylag Goose
Stats
Wingspan147–180 cm
Weight2160–4560 g
Length74–91 cm
Lifespan wild10–20 yrs
Size
XS
S
M
L
XL
Nesting
Nest typeScrape
Clutch size4–6 eggs
Incubation27–29 days
Breeding months
1
2
3
4
5
6
7
8
9
10
11
12
Regional Status (Europe)
LC
Least Concern (Europe)
IUCN Red List
MigrationPartial migratory
Social BehaviourFlocking

Diet: Herbivore

🌾Grain
🌱Grass
🍃Plants

Habitat

🚜 Farmland🛶 Lake wetlands🌊 Marine🏞️ River
✦ Fun Fact

The Greylag Goose was the primary subject of Konrad Lorenz's studies on 'imprinting'. He showed that goslings follow the first moving object they see after hatching.

About

The Greylag is the largest 'grey goose' and the ancestor of most domestic geese. It is a heavy bird with a thick neck and a large orange or pinkish bill. It is a widespread resident across much of Europe. It lives on lakes, marshes, and damp moors. In flight, it is identified by striking pale grey patches on the forewing. These contrast sharply with the darker flight feathers.

Behaviour

Greylags are social birds that form lifelong pair bonds. They stay in family groups for many months. They are loud and vocal. Their deep 'honking' call is identical to the sound of a farmyard goose. They graze on land during the day but move to open water at night for safety. During the summer moult, they lose all flight feathers at once and cannot fly for about a month.
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