Northern Gannet vs Red-footed Booby
Morus bassanus so với Sula sula
Side-by-Side Comparison
| Thuộc Tính | Northern Gannet | Red-footed Booby |
|---|---|---|
| Tên Khoa Học | Morus bassanus | Sula sula |
| Bộ | Suliformes | Suliformes |
| Họ | Sulidae | Sulidae |
| Tình Trạng Bảo Tồn | Least Concern | Least Concern |
| Chiều Dài | 93,0 cm (36.6 in) | — |
| Chiều Dài Sải Cánh | 180,0 cm (70.9 in) | 73,4 cm (28.9 in) |
| Khối Lượng | 3000,0 g (105.82 oz) | 1086,6 g (38.33 oz) |
| Chế Độ Ăn | Shoaling fish, especially mackerel, herring, and capelin. Plunge-dives from heights of 30 meters at speeds … | -- |
| Số Trứng | 1 | 1 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Northern Gannet
Open ocean and coastal waters. Breeds in dense colonies on steep rocky islands and sea stacks.
Song & Call Comparison
Northern Gannet
Loud, harsh 'urrah-urrah' grunting and croaking at breeding colonies on sea stacks. Also gives a softer 'karrr' in flight. Large colonies are extremely noisy during the breeding season.
Red-footed Booby
Geographic Range & Migration
Northern Gannet
North Atlantic, breeding from Newfoundland and Gulf of St. Lawrence to Norway, Iceland, and Britain. Winters at sea south to the tropics.
Red-footed Booby
Tình Trạng Bảo Tồn
Northern Gannet
Red-footed Booby
How to Tell Them Apart
Northern Gannet
Brilliant white body with black wingtips and a golden-yellow wash on the head and nape. Blue-grey bill with dark lines and pale blue eye-ring.
Long, straight, pointed, pale blue-grey bill with serrated edges
Red-footed Booby
About These Birds
Northern Gannet
The northern gannet is a spectacular plunge-diver, folding its two-meter wingspan into an arrow shape to hit the water at up to 100 km/h. Air sacs under the skin and a reinforced skull protect it from the impact. Bass Rock in Scotland hosts over 150,000 gannets, the largest single colony of any seabird in the world.
Red-footed Booby
66–77 cm, wingspan 91–101 cm. Smallest booby; dimorphic: white and brown morphs; always has bright red feet. Breeds on tropical islands worldwide across Atlantic, Pacific, and Indian oceans. Nest in trees or shrubs; feeds on flyingfish and squid by plunge-diving.