Brent Goose Vs Canada Goose: Key Differences Explained

There are many species of birds that can be seen at different times of the year in the UK. Two species that often cause confusion for many bird watchers are the Brent Goose and the Canada Goose.

However, there are many differences between these two species to make identification fairly easy once you know what to look for. In this article we’ll highlight these differences allowing you to make a positive identification when out in the field. Keep reading to find out more.

Key Takeaways

• Brent Geese are far smaller than Canada Geese
• Brent Geese mainly breed in Arctic regions whereas Canada Geese are more widespread across North America
• Brent Geese have a softer, more quiet call compared to the loud call of the Canada Goose

What Is The Difference Between A Brent Goose And A Canada Goose?

The Brent Goose and the Canada Goose are both members of the family Anatidae (the duck, goose, and swan family), but they have many differences. Which include;

Visual Differences

The first and most obvious difference is the difference in size. Canada Geese are significantly larger with a much longer neck and more elongated body.

Brent Geese are far smaller with a more compact body and shorter neck. Brent Geese are in fact, one of the smallest species of geese seen in the UK.

Canada Geese have a black head and neck with a white “chinstrap”, a light brown or greyish-brown body with a lighter coloured chest which is broad and a white patch on their rump.

Brent Geese are typically darker with a black head, neck and chest. Some have a small white patch on their neck but that depends on the subspecies. They have a dark brown or grey body which contrasts with their lighter belly and black tail.

Differences In Habitat

The Canada Goose is native to North America and is found in the UK during the migration period when they travel across the Atlantic and into northern Europe. They have been introduced to many regions including the UK, Ireland, France, Finland, Sweden, Denmark, Japan, Chile, the Falkland Islands, Argentina and New Zealand.

Canada Geese are mainly herbivores and can often be seen close to fresh water. However, they are also found on brackish marshes, estuaries and lagoons. They often establish breeding colonies in urban settings like parks and public gardens. Although their diet is mainly herbivorous, they eat small insects and fish when other foods are scarce.

Brent Geese come in two main morphs, the pale bellied and the dark bellied geese. They breed in different habitats with the dark bellied morph favouring the Arctic coasts of central and western Siberia. 

These dark bellied morphs spend their winters in coastal areas of western Europe with more than half of their population wintering in southern England and the rest split between northern Germany and south-west France.

The pale bellied morphs breed in north-eastern Canada. They spend their winters along the Atlantic coast of the United States, with many migrating to Greenland, Svalbard, Denmark, north-east and south-west England, Scotland, Ireland and northern France.

Brent Geese are also mainly herbivores and survive on a diet mainly consisting of eelgrass, seaweed and sea lettuce. When these foods are scarce, Brent Geese will forage inland in search of grass or winter-sown cereal crops.

Nests & Eggs

Canada Geese nest in elevated areas close to streams, lakes, ponds and in some cases, on a beaver lodge. The nest itself is a shallow depression or scrape, lined with local plant materials and feathers.

The female will lay anywhere between 2 to 9 eggs which are primarily incubated by her. The male stays close by to protect the nest from any intruders.

The eggs are a creamy white colour but often get stained with vegetation from the nest. Each egg is around 33 mm long and 56 mm wide and has a smooth, glossy shell.

The nest of the Brent Goose is also a shallow depression in the ground close to water, lined with local plant materials and feathers. The female will lay anywhere between 3 to 5 chalky-white eggs which are around 75 x 47 mm in size.

The female is the primary incubator with the male standing guard over the nest keeping any would-be intruders away.

Bird Calls

These two goose species vary in their vocalisation as well. With Brent Geese being known for their quieter, softer call and Canada Geese known for their louder call.

The call of the Canada Goose is a familiar sound. This loud honking call does vary between individual birds, and is used for communication especially during flight, keeping the flock together. 

Male Canada Geese often make a low growling sound or a hiss when defending their nests and young.

Brent Geese have a distinctive call that is often heard as they fly along coastal regions. They make two distinctive calls, the “cronk” sound which is heard when they are flocking, and the sharper “cruk” sound when they feel threatened.

Male Brent Geese utter similar sounds to the Canada Goose when defending their nests and young.

Size & Weight

Canada Geese are much larger than Brent Geese and can easily be recognised by their colours and markings.

An average adult Canada Goose is around 90 to 110 cm in length with a wingspan of around 140 to 180 cm. They can weigh anywhere between 4.2 to 5 kg which is around 4 times as much as an adult Brent Goose.

The average length of an adult Brent Goose is around 56 to 61 cm with a wingspan of around 110 to 120 cm. They can weigh anywhere between 1.3 to 1.6 kg.

SEE ALSO: Black Guillemot Life Cycle: Nest Building To Fledging (and everything in between)

Frequently Asked Questions