Trumpeter Swan

About

The Trumpeter Swan is the largest waterfowl species in North America and the heaviest flying bird native to the continent. Renowned for its majestic appearance and powerful, trumpet-like call, it is a symbol of wilderness and successful conservation efforts after facing near extinction in the early 20th century.

Size & lifespan

Length

138-180 cm (54-71 in)

Wingspan

185-250 cm (73-98 in)

Weight

7-13.6 kg (15-30 lbs), with males typically larger than females

Lifespan

10-20 years in the wild, up to 30 years in captivity

Diet

Herbivore

Physical characteristics

Plumage

Adults are entirely pure white. Juveniles (cygnets) are typically dull gray, sometimes with a brownish tinge, gradually molting to white over their first year.

Beak shape

Large, wedge-shaped bill, entirely black. A distinctive feature is the 'salmon patch' or 'smile line' where the black bill meets the pinkish-red gape line, though this is not always visible and can be subtle.

Eye color

Dark brown

Leg color

Black

Distinguishing features

Massive size, all-white plumage (adults), entirely black bill, and a deep, resonant, trumpet-like call. The bill is typically straight, lacking the yellow lore patch often seen on Tundra Swans.

Juvenile appearance

Cygnets are covered in dense gray down, which transitions to dull gray-brown juvenile plumage. Their bills are grayish-black, often with a pinkish base, and their legs are grayish-pink. They gradually whiten over their first year.

Seasonal changes

No significant seasonal plumage changes in adults. Juveniles transition from gray to white over their first year.

Sexual dimorphism

Males (cobs) are generally larger and heavier than females (pens), but plumage is identical.

How to identify

1. 1

   Size

   Look for the largest white waterfowl in North America. Its sheer size often makes it stand out from other swans and geese.

2. 2

   Bill Color

   Observe the bill. It should be entirely black. Absence of any yellow at the base of the bill (lore spot) is a key differentiator from Tundra Swans.

3. 3

   Bill Shape/Gape Line

   Note the bill's profile. Trumpeter Swans typically have a straight gape line (where the upper and lower mandibles meet), sometimes with a subtle 'salmon patch' of pinkish-red. Tundra Swans often have a more concave gape line.

4. 4

   Vocalization

   Listen for its distinctive call. The deep, resonant, trumpet-like 'oh-OH' is unmistakable and differs significantly from the higher-pitched Tundra Swan and the silent Mute Swan.

5. 5

   Neck Posture

   While swimming, Trumpeter Swans typically hold their neck straight, unlike the S-curved neck of a Mute Swan.

6. 6

   Juvenile Plumage

   Young birds (cygnets) are dull gray with grayish-black bills, gradually turning white over their first year. This distinguishes them from adult white swans.

Habitat & range

Biomes

Freshwater wetlands, marshes, shallow lakes, slow-moving rivers, and ponds.

Geographic range

North America, primarily in Alaska, western Canada, and scattered populations in the Rocky Mountains, Great Lakes region, and Pacific Northwest of the United States. Wintering grounds extend south to parts of the central and southern U.S.

Elevation range

Typically found at low to moderate elevations, primarily in wetland habitats.

Preferred environments

Large, undisturbed bodies of shallow freshwater with abundant submerged aquatic vegetation for foraging, and isolated islands or muskrat/beaver lodges for nesting. Requires open water for foraging and takeoff/landing, especially during winter.

Behavior

Activity time

Diurnal, active during daylight hours for foraging and other activities.

Feeding habits

Primarily herbivorous, feeding on submerged aquatic vegetation such as pondweeds, sedges, rushes, and tubers. They dabble and up-end in shallow water to reach vegetation. During winter, they may also graze on waste grains in agricultural fields.

Social behavior

Highly social outside of the breeding season, forming large flocks on wintering grounds. During breeding, pairs are territorial and can be aggressive towards other swans and waterfowl.

Flight pattern

Powerful, direct flight with slow, deliberate wing beats. Requires a long 'runway' on water to become airborne due to their heavy body mass. Flies with neck outstretched. Often flies in V-formations during migration.

Migration pattern

Migratory in most of its range, moving from northern breeding grounds to ice-free wintering areas further south. Some populations, particularly in the Pacific Northwest and parts of the Great Lakes, may be resident or undertake short-distance movements. Migration occurs in large family groups or flocks.

Territoriality

Breeding pairs are highly territorial, defending their nesting sites and surrounding foraging areas from other swans and potential threats. Non-breeding birds are less territorial.

Breeding & reproduction

Breeding season

Begins in late April to May, with eggs laid from late May to early June.

Nesting habits

Nests are large mounds of vegetation (grasses, sedges, cattails, mosses) built on muskrat or beaver lodges, small islands, or elevated hummocks in shallow water. Both parents contribute to nest construction.

Clutch size

3-9 eggs, commonly 4-6.

Egg description

Large, dull white to creamy white, sometimes stained. Typically oval-shaped.

Incubation period

32-37 days, primarily by the female.

Fledging period

90-120 days. Cygnets are precocial and can swim and feed shortly after hatching but remain with parents for their first year.

Parental care

Both parents care for the young. The male guards the nest and territory, while the female incubates. After hatching, both parents protect and guide the cygnets, teaching them foraging skills. Cygnets stay with their parents through their first winter.

Where to find

Field tips

1. Scan large bodies of water. Use binoculars or a spotting scope to scan open water for large white birds. Their size makes them relatively easy to spot from a distance.
2. Listen for their call. Their loud, distinctive call is often heard before the bird is seen, especially in foggy or low-light conditions.
3. Visit known wintering grounds. During winter, visit wildlife refuges and protected areas known to host Trumpeter Swan populations for the best viewing opportunities.
4. Observe behavior. Watch for their characteristic 'up-ending' behavior while foraging in shallow water, with their tail pointing skyward.
5. Distinguish from other swans. Pay close attention to bill color and shape, and listen carefully to vocalizations to differentiate from Tundra and Mute Swans.

Similar species

Quick facts

Largest North American Waterfowl:

Yes

Heaviest Flying Bird in North America:

Yes

Bill Color (Adult):

Entirely black

Call:

Deep, trumpet-like bugle

Diet:

Submerged aquatic vegetation

Conservation Success Story:

Yes, recovered from near extinction

Fun facts

• Trumpeter Swans were hunted to near extinction in the 19th and early 20th centuries for their feathers and meat, with only 69 individuals known in the contiguous U.S. by the 1930s.
• Their scientific name 'buccinator' comes from the Latin word for 'trumpeter' or 'bugler', referring to their distinctive call.
• A pair of Trumpeter Swans can maintain a breeding territory of several square miles, aggressively defending it from intruders.
• Cygnets stay with their parents for their entire first year, learning migration routes and foraging techniques.
• They require a long stretch of open water (up to 100 yards) to take off, flapping their powerful wings to gain momentum.

Scientific classification

Kingdom

Animalia

Phylum

Chordata

Class

Aves

Order

Anseriformes

Family

Anatidae

Genus

Cygnus

Species

Cygnus buccinator

Explore the Trumpeter Swan