Bewick’s Swan vs Whooper Swan: Key Differences Explained

Swans are often associated with elegance and grace, but did you know that there are key differences between the Bewick’s Swan and the Whooper Swan?

Although these two species share some similarities, they also have distinct characteristics that set them apart. From their size and appearance to their migration patterns and vocalisations, understanding these differences can help you identify and appreciate these remarkable birds more fully.

Table of Contents

Key Takeaways

The Whooper Swan is significantly larger than the Bewick’s Swan.
Bewick’s Swans have unique bill patterns, while Whooper Swans have a distinctive large yellow triangle or wedge on their bills.
Whooper Swans have a deeper, more resonant call compared to the softer, more melodious sounds of the Bewick’s Swan.
Bewick’s Swans migrate from Siberia to the UK, while Whooper Swans typically travel from Iceland to the UK.
The wingspan of the Whooper Swan is larger, ranging between 205-235 cm, whereas the Bewick’s Swan’s wingspan ranges from 170-195 cm.

What Is The Difference Between A Bewick’s Swan And A Whooper Swan?

The Bewick’s Swan (Cygnus columbianus bewickii) and the Whooper Swan (Cygnus cygnus) are both captivating species of swans found in the UK, especially during the winter months.

While they may seem similar at first glance, there are several key differences that distinguish them.

Visual Differences

One of the most noticeable differences between these two species is their size.

The Whooper Swan is generally larger, with an average length of 140 to 160 cm and a wingspan ranging from 205 to 235 cm. In contrast, the Bewick’s Swan is smaller, measuring 115 to 130 cm in length with a wingspan of 170 to 195 cm.

Another key visual difference lies in their beak patterns. The Bewick’s Swan has a distinctive black and yellow bill, with each bird displaying a unique pattern that is often compared to human fingerprints. This unique feature allows researchers to identify individual Bewick’s Swans.

On the other hand, the Whooper Swan has a larger yellow patch on its bill, shaped like a triangle or a wedge, making it easier to identify at a distance.

In terms of posture, the Whooper Swan holds its neck straight and erect, giving it a more regal appearance, whereas the Bewick’s Swan’s neck is more curved, contributing to its more delicate and compact look.

Differences In Habitat

Both species are migratory, but they differ in their breeding and wintering habitats. Bewick’s Swans breed in the Arctic regions of Siberia and migrate to the UK and Western Europe for the winter. They are often found in Eastern England’s wetlands and the Severn Estuary.

Whooper Swans, on the other hand, breed predominantly in Iceland and make their way to the UK during the winter months. They favour estuaries, wetlands, and large bodies of open water, often seen in Scotland and Northern England.

While both species share the same wintering grounds in the UK, their breeding habitats and migratory routes are quite different, reflecting their unique adaptations to their environments.

Nests & Eggs

Both Bewick’s and Whooper Swans build their nests in their respective breeding grounds, so nest observation is not typically possible in the UK. However, their nesting habits are similar, with both species constructing large mounds of vegetation near water bodies.

Bewick’s Swans usually lay 3 to 5 eggs, while Whooper Swans may usually lay 4 to 7 eggs. The eggs of both species are creamy white, with Whooper Swan eggs being slightly larger due to the bird’s larger size.

Bird Calls

The calls of these swans are another distinguishing feature. Bewick’s Swans have a softer, more melodious voice, often described as a series of mellow trumpet-like sounds. Their calls are less sonorous than those of larger swans but create a beautiful symphony during migration.

Whooper Swans, true to their larger size, have deeper and more resonant calls. They produce a series of strident “kloo-kloo-kloo” sounds, often in groups of three or four. These calls are lower-pitched and more powerful compared to Bewick’s Swans, adding to the Whooper Swan’s majestic presence.

Size & Weight

As previously mentioned, the Whooper Swan is significantly larger than the Bewick’s Swan. The Whooper Swan can weigh between 9 and 11 kg, with some males reaching up to 15.5 kg, making it one of the heaviest flying birds.

The Bewick’s Swan, being more petite, weighs between 4.5 and 6 kg.

When it comes to their measurements, Whooper Swans measure around 140 to 160 cm in length with an impressive wingspan of 205 to 235 cm.

Bewick’s Swans are smaller with a length of 115 to 130 cm and a wingspan of 170 to 195 cm.

Frequently Asked Questions

How can I tell the difference between a Bewick’s Swan and a Whooper Swan?

The main differences are size and bill markings. Bewick’s Swans are smaller with a more compact build and have a smaller yellow patch on their bill. Whooper Swans are larger with a more extensive yellow patch on their bill that forms a wedge shape.

When can I see Bewick’s and Whooper Swans in the UK?

Both Bewick’s and Whooper Swans are winter visitors to the UK. They can typically be seen from October through March, with some individuals staying into April.

Are Bewick’s and Whooper Swans endangered?

While not endangered, both species face conservation challenges. Bewick’s Swans, in particular, have seen declining numbers in recent years. Both are protected under the Wildlife and Countryside Act in the UK.

Do Bewick’s and Whooper Swans migrate together?

While both species are migratory, they generally follow different routes. Bewick’s Swans migrate from Siberia, while Whooper Swans primarily come from Iceland. However, they may sometimes be seen in mixed flocks at wintering sites in the UK.