Snow Goose Life Cycle: Nest Building To Fledging (and everything in between)
The Snow Goose is a native of North America and is only a winter visitor to the UK. They breed in Alaska, Canada and northern parts of Siberia.
Snow Geese have 2 different colours or “morphs” as they’re known in scientific circles, the white morph and the dark morph. White morphs are more common with adults being predominantly white, but having black wingtips, a pink bill, pink legs with many having a yellowish staining on their heads.
Dark morphs, also known as the Blue Goose, are dark grey in colour with a white face. An interesting fact about Snow Geese is that the different morphs interbreed and can have chicks of either colour morph.
To find out more about these interesting Geese, keep reading.
Table of Contents
How Long Does A Snow Goose Live?
Snow Geese can live up to 15-20 years in the wild, with some individuals living even longer. In fact, there have been individuals that have survived for longer than 27 years according to ring records.
However, the average lifespan of the Snow Goose tends to be around 6 years.
Unlike some birds which are under threat, the Snow Goose population is growing at a steady rate. In North America numbers of Snow Geese have increased to the point where Tundra breeding grounds in the Arctic and saltmarsh wintering grounds are becoming degraded.
There has been an increase of over 300% since the 1970s. With an estimated 5 million breeding birds worldwide and a population increase of around 5% per year.
How Fast Can A Snow Goose Fly?
The Snow Goose can fly at speeds of up to 50 mph (80 km/h). That’s around 22 metres per second! They typically form a “V” formation when flying south to reach their winter homes.
However, sometimes they appear as a huge “snowstorm” of large white birds flying through the northern skies.
Are Snow Geese Aggressive?
Snow Geese are not generally aggressive birds and are often found in large flocks all feeding peacefully. Having said that, like many species of birds, Snow Geese can become quite aggressive during the breeding season.
With pairs defending a large area around their nesting sites to protect their nest, eggs and chicks. It’s typically the males that are more involved in aggressive interactions than females.
These aggressive behaviours often turn quite violent and can escalate to actual biting and striking their opponents with their wings. These violent encounters can even lead to fatalities in many cases.
What Is A Snow Goose’s Habitat?
Snow Geese nest on open ground which is relatively flat close to the coast. In winter, they spend their time near shallow freshwater bays or coastal areas around marshland. With many spending their time inland on grasslands, prairies and farmland.
They have a range that spreads from almost all of North America as far as Greenland and down to the east coast of Mexico. They tend to nest in Northern Alaska, around the Hudson Bay in Canada and as far as the Russian coasts.
Although considered to be quite a rare sight in the UK, there are around 100 sightings recorded each year. They are typically found in places like Islay and Strathbeg Loch in Scotland.
How Long Does It Take For A Snow Goose To Build A Nest?
The female Snow Goose is the nest builder. She selects a site which is often elevated to avoid flooding and then creates a simple scrape nest. The nest is then lined with grass, moss and down feathers ripped from her own body.
The main time taken when building a nest is in the selection of the preferred nesting site. The female can take anywhere between a few hours to around 2 to 3 days to find what she considers to be the perfect site and then build the nest.
Eggs
Once the female is satisfied with the nest site and has built what she considers to be a sufficient nest, she will lay her eggs. This is an important part in the reproduction process of the Snow Goose.
Let’s take a closer look into this part of the Snow Goose’s life cycle.
When Do Snow Geese Lay Eggs?
The breeding season for the Snow Goose runs from late May until mid August. However, actual egg laying dates vary from year to year and are dependent on climatic conditions.
Both parents will defend the nest against any real or perceived intruders. These encounters can quickly escalate into violent clashes which often result in injury or death.
How Many Eggs Does A Snow Goose Lay?
The female Snow Goose will lay a clutch of around 6 to 7 eggs but a typical clutch usually contains 3 to 5 eggs.
What Do Snow Geese Eggs Look Like?
The eggs are a creamy white colour which often get stained in the nest by the female’s defecation which acts like a camouflage against the backdrop of the nesting materials. With each egg being around 80 x 53 mm in size.
How Long Do Snow Goose Eggs Take To Hatch?
The eggs are incubated solely by the female with the male standing guard. The incubation starts as soon as she has laid the last egg and lasts for around 22 to 25 days.
Chicks
Once the eggs hatch, we move onto the next stage in the reproductive process, the chicks.
How Many Chicks Does A Snow Goose Have?
In an ideal world every egg laid will develop into a healthy chick. The reality however, is somewhat different. The successful development of the embryo is highly dependent on the health and well being of the female Snow Goose.
If the female isn’t at the peak of her physical fitness, eggs can be as much as 50% smaller than those from a completely healthy female. In fact, many female Snow Geese can be observed voraciously eating for days or even weeks before she begins laying eggs.
Typically the larger or heavier the egg, the more likely the chick is to survive to become a fledgling. With that said, the average survival rate of Snow Goose eggs to chicks is around 70 to 90% which means from a clutch of 5 eggs, we can expect a brood of at least 3 to 4 chicks.
However, the post hatching survival rate is estimated to be around 50% due to a number of factors including predation, climatic conditions and food availability. That brings our chick number down from 4 hatched to 2 surviving to the fledgling stage of development.
When Do Snow Goose Chicks Open Their Eyes?
Snow Goose chicks are precocial which means they hatch either with their eyes open or they open shortly after hatching. The young goslings typically leave the nest around 24 hours after hatching.
They are able to feed themselves right from the first time they leave the nest.
When Do Snow Goose Chicks Fledge?
The young goslings still rely on their parents to offer them protection whilst they are growing and developing muscles and flight feathers. They generally fledge the nest around 45 to 50 days after hatching.
During their first year, the young goslings learn migratory routes and flying patterns from their parents.
SEE ALSO: Stonechat Life Cycle: Nest Building To Fledging (and everything in between)
Frequently Asked Questions
The average lifespan of a Snow Goose is around 6 years although many can live for around 15 to 20 years. There have even been recorded instances of individual Snow Geese reaching 27 years of age.
Snow Goose eggs are a creamy white colour which often get covered with the females excrement in the nest which acts as a camouflage. They are around 80 x 53 mm in size.
Although Snow Geese do not breed in the UK, they can often be seen in parts of Scotland during the months of October to March.
