No.306 · Birds · Common
Mute swan
Cygnus olor
One of Britain's heaviest flying birds: pure white, with an S-curved neck and an orange bill with a black knob at the base. Not really mute, just quieter than other swans.
When to see a mute swan
All year, mostly at dawn, by day and at dusk.
- J
- F
- M
- A
- M
- J
- J
- A
- S
- O
- N
- D
Time of day
- Dawn
- Day
- Dusk
- Night
Where to see a mute swan in the UK
- The Norfolk Broads. Drifts through the reeds on the open broad.
Mute swan facts at a glance
- Best time
- All year, all day: rivers, canals, ponds and broads. Cygnets from late spring.
- Where in the game
- Millbrook (canal and pond) and the Norfolk Broads (broad and river)
- Size
- Length about 1.5 m
- Wingspan
- About 2.2 m
- Weight
- About 9.4 kg (BTO adult average); males are heavier
- Lifespan
- Typically 10 years; the oldest ringed bird lived over 29 (BTO)
- Population
- About 7,000 pairs in the UK (BTO, 2016)
- Status
- Green (RSPB, Wildlife Trusts)
Diet
Mainly water plants, and grass from nearby fields and meadows.
Habitat
Lakes, slow rivers, canals, ponds and broads.
Breeding
A big nest of reeds and plants hidden in waterside vegetation; 4–7 eggs. Newly hatched cygnets often ride on a parent's back.
Field signs
- The loud whoosh of wings overhead: you may hear one before you see it
- Webbed footprints on muddy banks
- A heap of reeds at the water's edge with a big white bird sitting on it
Did you know?
- The monarch keeps the right to all unmarked mute swans in open water, though it's only exercised on stretches of the Thames and its tributaries.
- Lead fishing weights once poisoned many swans; a ban on selling them has largely solved it on lowland rivers (RSPB).
- 'Busking' is the threat display: neck curved back and wings half raised.
Moments worth waiting for
- Busking
The cob comes at you across the water, neck curved back and wings arched over his back. It's a warning. You take it.
Photo tip
White feathers blow out easily, so expose for them and shoot in soft light. Get low, near the water, for a bird that fills the frame without towering over it.
Be a good naturalist
Give nesting swans plenty of room: a cob defending his cygnets means it. Take any lost fishing line and weights home with you.
The law
Protected by the Wildlife and Countryside Act 1981.