Arctic Tern vs Diều ăn rắn
Sterna paradisaea so với Sagittarius serpentarius
Side-by-Side Comparison
| Thuộc Tính | Arctic Tern | Diều ăn rắn |
|---|---|---|
| Tên Khoa Học | Sterna paradisaea | Sagittarius serpentarius |
| Bộ | Charadriiformes | Accipitriformes |
| Họ | Laridae | Sagittariidae |
| Tình Trạng Bảo Tồn | Least Concern | Endangered |
| Chiều Dài | 34,0 cm (13.4 in) | 130,0 cm (51.2 in) |
| Chiều Dài Sải Cánh | 80,0 cm (31.5 in) | 210,0 cm (82.7 in) |
| Khối Lượng | 110,0 g (3.88 oz) | 3700,0 g (130.51 oz) |
| Chế Độ Ăn | Small fish and crustaceans caught by plunge-diving from the air. Hovers briefly before diving. | Snakes, lizards, small mammals, and large insects. Hunts on foot, stomping prey to death with … |
| Số Trứng | 2-3 | 1-4 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Môi Trường Sống Chung
Không
Arctic Tern only
Diều ăn rắn only
Arctic Tern
Breeds on coastal and tundra habitats. Spends most of its life at sea over the open ocean. Nests in colonies on beaches and rocky shores.
Diều ăn rắn
Open grasslands, savannas, and light woodland across sub-Saharan Africa. Avoids dense forests and very arid regions.
Song & Call Comparison
Arctic Tern
A sharp, grating 'kree-yah' alarm call. Also gives 'kik-kik-kik' near the nest. Highly aggressive vocally during the Arctic breeding season. Calls are harsh and insistent.
Diều ăn rắn
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
Arctic Tern
Breeds in the Arctic and sub-Arctic. Migrates to the Antarctic, experiencing two summers per year. Found on every ocean.
Diều ăn rắn
Sub-Saharan Africa from Senegal and Somalia south to South Africa. Resident throughout its range.
Tình Trạng Bảo Tồn
Arctic Tern
Diều ăn rắn
How to Tell Them Apart
Arctic Tern
Pale grey upperparts, white underparts with a black cap. Blood-red bill and short red legs. Deeply forked tail streamers. Winter adults lose the full black cap.
Slender, pointed, bright red bill
Diều ăn rắn
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
Arctic Tern
The Arctic tern holds the record for the longest known migration of any animal, traveling roughly 70,000 km annually from Arctic to Antarctic and back. Over its 30-year lifespan, it may fly the equivalent of three round trips to the Moon. This remarkable bird experiences more daylight than any other creature on Earth.
Diều ăn rắn
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.