アカオノスリ vs ヘビクイワシ
Buteo jamaicensis 比較対象 Sagittarius serpentarius
Side-by-Side Comparison
| 属性 | アカオノスリ | ヘビクイワシ |
|---|---|---|
| 学名 | Buteo jamaicensis | Sagittarius serpentarius |
| 目 | Accipitriformes | Accipitriformes |
| 科 | Accipitridae | Sagittariidae |
| 保全状況 | Least Concern | Endangered |
| 体長 | 53.0 cm (20.9 in) | 130.0 cm (51.2 in) |
| 翼開長 | 124.0 cm (48.8 in) | 210.0 cm (82.7 in) |
| 体重 | 1080.0 g (38.10 oz) | 3700.0 g (130.51 oz) |
| 食性 | Small to medium mammals, especially voles, mice, and rabbits. Also takes birds, reptiles, and large … | Snakes, lizards, small mammals, and large insects. Hunts on foot, stomping prey to death with … |
| 一腹卵数 | 2-4 | 1-4 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
アカオノスリ
Open country with scattered elevated perches such as trees, poles, and cliffs. Adaptable to farmland, grasslands, roadsides, and suburban areas.
ヘビクイワシ
Open grasslands, savannas, and light woodland across sub-Saharan Africa. Avoids dense forests and very arid regions.
Song & Call Comparison
アカオノスリ
Iconic, raspy descending scream: 'kreeeeee-ar', often used in films for all raptors. Gives short barking 'kak' notes near nest. Juveniles beg with persistent squealing whistles.
ヘビクイワシ
A surprisingly deep, resonant croaking 'kowrr-kowrr' often heard at dawn on African savannas. Also gives pig-like grunting sounds. Mostly silent compared to true songbirds.
Geographic Range & Migration
アカオノスリ
North America from Alaska to Panama, including the Caribbean. One of the most common raptors in North America.
ヘビクイワシ
Sub-Saharan Africa from Senegal and Somalia south to South Africa. Resident throughout its range.
保全状況
アカオノスリ
ヘビクイワシ
How to Tell Them Apart
アカオノスリ
Variable plumage from pale to dark morphs. Most adults have rich brown upperparts, a pale breast with a dark belly band, and the characteristic rufous-red tail.
Dark hooked bill with a yellow cere
ヘビクイワシ
Grey body plumage with black flight feathers and thigh feathers. Distinctive long black crest feathers trail from the back of the head. Orange-red bare facial skin.
Short, strong, hooked greyish bill with a yellowish cere
About These Birds
アカオノスリ
The red-tailed hawk is the most widespread and common hawk in North America. Its screaming cry is so iconic that it is often dubbed over bald eagle footage in films and television. These adaptable raptors thrive in human-altered landscapes and are a familiar sight perched along highways.
ヘビクイワシ
The secretary bird is the only raptor that hunts primarily on foot, striding through grasslands on crane-like legs up to 1.2 meters tall. Its name may derive from the crest feathers resembling quill pens tucked behind a secretary's ear. The species is classified as Endangered due to habitat loss and decline across much of its range.