Mute Swan vs Snowy Owl
Cygnus olor compared with Bubo scandiacus
Side-by-Side Comparison
| Attribute | Mute Swan | Snowy Owl |
|---|---|---|
| Scientific Name | Cygnus olor | Bubo scandiacus |
| Order | Anseriformes | Strigiformes |
| Family | Anatidae | Strigidae |
| Conservation Status | Least Concern | Vulnerable |
| Length | 152.0 cm (59.8 in) | 63.0 cm (24.8 in) |
| Wingspan | 235.0 cm (92.5 in) | 145.0 cm (57.1 in) |
| Weight | 11000.0 g (388.01 oz) | 2100.0 g (74.08 oz) |
| Diet | Submerged aquatic vegetation, algae, and grass. Feeds by upending in shallow water, reaching depths of … | Primarily lemmings on the breeding grounds, where a pair may consume over 1,500 per year. … |
| Clutch Size | 5-7 | 3-14 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Mute Swan
Lakes, slow rivers, estuaries, and coastal lagoons. Often associated with parks and ornamental waters in Europe.
Snowy Owl
Arctic tundra for breeding. Winters in open habitats resembling tundra, including prairies, airports, shorelines, and agricultural fields.
Song & Call Comparison
Mute Swan
Despite its name, not truly mute: gives hissing snorts and low grunting when threatened. Wings produce a loud rhythmic whistling throbbing sound in flight.
Snowy Owl
Male gives a deep booming hoot 'hooooo' and a rising 'hoo-hoo' series. Also barks sharply when alarmed. Quieter than many owls; silent during long Arctic winter hunts.
Geographic Range & Migration
Mute Swan
Native to Europe and western Asia. Introduced to North America, South Africa, Australia, and New Zealand.
Snowy Owl
Circumpolar Arctic for breeding. Irruptive winter movements bring birds south to the northern United States, Europe, and Asia.
Conservation Status
Mute Swan
Snowy Owl
How to Tell Them Apart
Mute Swan
All-white plumage in adults. Cygnets are grey-brown, gradually whitening over the first year. Graceful S-curved neck posture is distinctive.
Orange bill with a prominent black knob at the base, larger in males
Snowy Owl
Adult males are almost entirely white. Females and immatures have dark brown barring and spotting. Yellow eyes and fully feathered feet.
Dark hooked bill mostly hidden by dense facial feathering
About These Birds
Mute Swan
The mute swan is one of the heaviest flying birds, with males weighing up to 14 kg. Despite its name, it is not truly mute, producing hissing, grunting, and snorting sounds. Mute swans form lifelong pair bonds and their aggressive defense of nesting territory is well known.
Snowy Owl
The snowy owl is the heaviest North American owl and one of the most charismatic Arctic birds. Unlike most owls, it is largely diurnal, necessitated by the continuous daylight of Arctic summers. Snowy owl irruptions — periodic mass southward movements — are tied to lemming population cycles.