Great Blue Heron vs Snowy Owl
Ardea herodias 比較対象 Bubo scandiacus
Side-by-Side Comparison
| 属性 | Great Blue Heron | Snowy Owl |
|---|---|---|
| 学名 | Ardea herodias | Bubo scandiacus |
| 目 | Pelecaniformes | Strigiformes |
| 科 | Ardeidae | Strigidae |
| 保全状況 | Least Concern | Vulnerable |
| 体長 | 117.0 cm (46.1 in) | 63.0 cm (24.8 in) |
| 翼開長 | 183.0 cm (72.0 in) | 145.0 cm (57.1 in) |
| 体重 | 2400.0 g (84.66 oz) | 2100.0 g (74.08 oz) |
| 食性 | Primarily fish, also frogs, snakes, small mammals, insects, and other birds. Hunts by standing motionless … | Primarily lemmings on the breeding grounds, where a pair may consume over 1,500 per year. … |
| 一腹卵数 | 2-7 | 3-14 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Great Blue Heron
Wetlands of all types including marshes, swamps, riverbanks, lake edges, and coastal shores. Also hunts in fields and meadows.
Snowy Owl
Arctic tundra for breeding. Winters in open habitats resembling tundra, including prairies, airports, shorelines, and agricultural fields.
Song & Call Comparison
Great Blue Heron
Deep, harsh, croaking 'frahnk-frahnk' call in flight. Also gives low guttural grunts at the nest. Alarmed birds give repeated croaks. Mostly silent for such a large wader.
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
Great Blue Heron
North and Central America from Alaska and southern Canada to the Caribbean and Galapagos Islands.
Snowy Owl
Circumpolar Arctic for breeding. Irruptive winter movements bring birds south to the northern United States, Europe, and Asia.
保全状況
Great Blue Heron
Snowy Owl
How to Tell Them Apart
Great Blue Heron
Blue-grey body with a white head bearing a broad black stripe extending to a long black plume. Rufous-brown thighs. In flight, the neck is folded into an S-shape.
Long, dagger-like yellowish bill
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
Great Blue Heron
The great blue heron is the largest heron in North America, standing up to 1.4 meters tall. These patient hunters can stand motionless for extended periods before striking at prey with remarkable speed. They nest in large colonies called heronries, often returning to the same site year after year.
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.