A Bewick's swan (<i>Cygnus columbianus bewickii</i>), a subspecies of tundra swan, photographed at Sylvan Heights Bird Park in Scotland Neck, North Carolina
A Bewick's swan (Cygnus columbianus bewickii), a subspecies of tundra swan, photographed at Sylvan Heights Bird Park in Scotland Neck, North Carolina
Photograph by Joel Sartore, National Geographic Photo Ark

Tundra Swan

Common Name:
Tundra Swan
Scientific Name:
Cygnus columbianus
Type:
Birds
Diet:
Omnivore
Group Name:
Flock
Average Life Span In The Wild:
Up to 20 years
Size:
Body: 3.9 to 4.8 feet; wingspan: 5.5 feet
Weight:
8.4 to 23.1 pounds
IUCN Red List Status:
Least concern
Current Population Trend:
Unknown

The snowy white tundra swan breeds in the Arctic and migrates many miles to winter on North America's Atlantic and Pacific coastlines, bays, and lakes.

Range and Population

The eastern population frequents the Chesapeake Bay and North Carolina, while the western population typically winters in California. These animals fly some 3,725 miles round-trip between their distant habitats, and make the daunting journey twice each year. Tundra swan subspecies also winter in Europe and Asia.

Tundra swans are often confused with trumpeter swans, and indeed the two species are very similar in appearance. They are most easily distinguished by their calls.

Behavior

Tundra swans winter on the water and sleep afloat. They are strong and speedy swimmers that take to the air with a running start, clattering across the water's surface with wings beating. In flight, the rhythmic flapping of the swan's wings produces a tone that once earned it the name "whistling swan."

These large birds feed by dipping their heads underwater to pluck aquatic plants, tubers, and roots. They also eat shellfish and are developing an increasing taste for grains and corn found in farmland areas.

Reproduction

Believed to mate for life, these swans actually pair up for nearly an entire year before breeding. Though in their winter grounds they gather in huge flocks, they breed as solitary pairs spread out across the tundra. Each couple defends a territory of about three-fourths square miles.

The bird's tundra nests are large stick dwellings lined with moss and grasses. Ideally, they are situated close to a pond or other water source.

Females typically lay about four eggs and incubate them for 32 days while males guard the nest. Young chicks are protected from cold and predators, including swarms of voracious Arctic mosquitoes. Tundra swans can be nasty when aroused, and the birds may even be able to fend off predators like foxes and jaegers.

Despite the tundra swan's dedicated efforts, its entire breeding season is subject to the whims of the Arctic climate. An early freeze or late spring may cause significant reproductive problems. Yet populations are stable, and the birds are managed and hunted for sport in some locales.

This photo was submitted to Your Shot, our photo community on Instagram. Follow us on Instagram at @natgeoyourshot or visit us at natgeo.com/yourshot for the latest submissions and news about the community.
This photo was submitted to Your Shot, our photo community on Instagram. Follow us on Instagram at @natgeoyourshot or visit us at natgeo.com/yourshot for the latest submissions and news about the community.
Photograph by Robert Dreeszen, National Geographic Your Shot

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