Swanlets › How to identify UK swans
How to identify UK swans
Three swan species are regularly seen in Britain. The bill and the way the bird holds its neck are the quickest clues, and the time of year helps too.
Quick comparison
| Feature | Mute swan | Whooper swan | Bewick's swan |
|---|---|---|---|
| Bill | Orange with black edge and knob | Long yellow wedge with black tip | Smaller yellow patch, rounder, with black tip |
| Neck | Curved, often with head angled down | Held straight and upright | Straight, shorter and thicker |
| Size | Largest | Almost as large | Smallest, goose-like |
| When | All year | Autumn to early spring | Winter only, now scarce |
| Where | Lakes, rivers, canals, estuaries | Wet fields and reserves, mainly north and east | Washes and wetland reserves, mainly East Anglia |
Mute swan
The mute swan is the swan of parks and canals. Adults have an orange bill with a black knob at the base, which is larger in males, and they often arch their wings over their backs in a threat display. They are not actually mute: they hiss, snort and grunt, and their wings make a throbbing whoosh in flight that you can hear from some distance.
Young mute swans are a dull grey-brown and have a pinkish-grey bill without a knob, which slowly turns orange. Our cygnets page follows that change month by month. A small number of cygnets are born white, a colour form sometimes called a "Polish swan". It is natural, and the legs are grey-pink instead of black.
Whooper swan
Whooper swans nest in Iceland and spend the winter here. Look for the long, straight neck and the large triangle of yellow on the bill that runs to a point towards the tip. The wedge of yellow is the easiest field mark. As the name suggests they are noisy, with loud bugling calls, particularly in flocks. They feed in fields of stubble and potatoes as well as on water.
Bewick's swan
Bewick's swans breed on the Russian tundra. They are the smallest of the three, with a rounder head and a smaller yellow patch on the bill. Every bird has its own pattern of black and yellow on the bill, which researchers at the Wildfowl and Wetlands Trust have used for decades to recognise individuals. Numbers wintering in the UK have dropped sharply in recent decades, so a sighting is now something special. Your best chance is at a reserve such as Welney; see where to see swans.
Other swans you might see
Occasionally black swans, originally from Australia, are seen on lakes. They are escapes or park birds, not wild UK visitors. A white bird with a very small, shy look and a dull yellow bill could also be a feral or domestic goose, so check the neck length and bill shape before you log it.
A simple checklist
- Is the bill orange? It is a mute swan.
- Is it yellow and black, with a straight neck? It is a whooper or a Bewick's swan.
- Is the yellow patch large and pointed and the bird big? Whooper.
- Is it noticeably smaller with a rounded patch? Bewick's.
Winter flocks are often mixed, so scan the whole group. Once you have your identification, you may want to read about how swans are protected, because whooper and Bewick's swans get extra protection when nesting.
Frequently asked questions
How can I tell a whooper swan from a mute swan?
Look at the bill and neck. A mute swan has an orange bill and a curved neck, a whooper has a yellow and black bill and a straight neck.
Are Bewick's swans rare in the UK?
Their winter numbers have fallen a lot in recent decades, so they are now much less common than whooper swans. The Wildfowl and Wetlands Trust monitors them.
Why are mute swans called mute?
They are less vocal than other swans, but they do hiss, grunt and snort.