Canada Goose

Canada Goose facts at a glance

How big is a canada goose?

An adult canada goose measures 1 m long — about 58% of the height of an average adult person (1.73 m) — and weighs around 5.0 kg, about 7% of an average adult’s body weight (70 kg).

What is a group of canada gooses called?

Explore more animal collective nouns and baby animal names .

The V-formation and migration

Canada geese are celebrated for flying in a distinctive V-formation during their long seasonal migrations. Each bird flies slightly above the one in front, catching the uplift from its wingtips so the whole flock saves energy, and the lead position is rotated as birds tire. Migrating flocks can travel hundreds of kilometres in a day and reach speeds of up to 90 km/h with a following wind. Their honking calls help the flock stay together across great distances and in poor visibility.

Grazing and diet

Canada geese are herbivores that feed mainly on grasses, sedges, grain, and aquatic plants. On land they graze like small livestock, cropping lawns, pastures, and playing fields with their serrated bills, while in water they up-end to reach submerged vegetation. In autumn and winter they switch heavily to waste grain in harvested fields, building fat reserves for migration and cold weather. This flexible, plant-based diet is one reason the species does so well around farmland and towns.

Appearance and identification

The Canada goose is instantly recognisable by its long black neck and head marked with a broad white "chinstrap" across the throat. The body is greyish-brown above and paler below, ending in a white rump band and black tail. Adults typically weigh 3 to 6 kg and measure about a metre long, with the so-called giant subspecies growing heavier still. Males and females look alike, though ganders are usually a little larger than geese.

Nesting and goslings

Canada geese pair for life and both parents share in raising the brood. The female builds a nest of grass and down on the ground near water and incubates a clutch of usually four to seven eggs for about four weeks, while the gander stands guard nearby. The fluffy yellow-and-grey goslings can walk, swim, and feed within a day of hatching and follow their parents closely. Families often merge into large groups called crèches, and the young stay with their parents through their first migration.

Behaviour and defence

Canada geese are bold, social birds that gather in noisy flocks outside the breeding season. During nesting, however, a gander will defend his mate and eggs fiercely, hissing, spreading his wings, and charging at intruders many times his size, including people and dogs. This aggression around nests is a common source of conflict in parks and gardens. Their alertness and willingness to sound the alarm also make them effective early-warning sentinels for other wildlife.

Adaptability and status

The Canada goose is listed as Least Concern and has become one of North America's great conservation success stories, rebounding strongly after historic overhunting. It thrives in human-altered landscapes such as parks, golf courses, reservoirs, and farmland, and many populations have stopped migrating where winters are mild and food is plentiful. Introduced birds have also established themselves in the UK and parts of Europe. In some areas they are now so numerous that they are considered a nuisance, with lifespans reaching up to 24 years in the wild.

Did you know? Canada Goose facts

• Canada geese fly in iconic V-formations honking over North America.
• Migratory Bird Treaty Act protects them in the US — permits needed for control.
• Contact calls coordinate flock movement and maintain pair bonds.
• Conservation: Least Concern.

Diet & feeding

Canada Goose feeds primarily as a grasses, sedges, grain.

Adaptations

• Rotating lead positions saves energy on long migrations.
• Resident geese foul parks and can be aggressive during nesting.

Behaviour & ecology

• Rotating lead positions saves energy on long migrations.
• Resident geese foul parks and can be aggressive during nesting.

Communication

• Canada Goose uses calls and visual displays to communicate territory, alarm, and breeding status.
• Vocal repertoires vary by species and are often learned or refined during development.

Habitat & range

Lakes and fields across North America

Ecological role

Canada Goose contributes to seed dispersal, insect control, or nutrient cycling depending on diet and foraging habits.

Conservation status of the Canada Goose

Sources & references

This guide is compiled and reviewed against established zoological and conservation references. Key sources for the Canada Goose:

• IUCN Red List of Threatened Species

  Conservation status (Least Concern) reflects the IUCN Red List category for Branta canadensis.

• iNaturalist — observations & photos

  Search citizen-science observations and community IDs for Branta canadensis. Useful for range checks and recent sightings — not a substitute for formal Red List status.

• GBIF — occurrence data

  Global Biodiversity Information Facility species search for Branta canadensis. Explore published occurrence records used in range research.

• eBird — bird observations

  Cornell Lab eBird target search for Canada Goose. Check recent checklists and seasonal abundance where birders report this species.

• IUCN Red List — Branta canadensis.

  Conservation status (Least Concern) and population trends.

• Animal Diversity Web — Branta canadensis. University of Michigan Museum of Zoology.

  Life history, morphology, and range.

• Global Animal Guide editorial standards

  How we research, source, review, and update every guide for accuracy.