Buller's Shearwater vs Northern Fulmar
Ardenna bulleri เปรียบเทียบกับ Fulmarus glacialis
Side-by-Side Comparison
| คุณสมบัติ | Buller's Shearwater | Northern Fulmar |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Ardenna bulleri | Fulmarus glacialis |
| อันดับ | Procellariiformes | Procellariiformes |
| วงศ์ตระกูล | Procellariidae | Procellariidae |
| สถานะการอนุรักษ์ | Vulnerable | Least Concern |
| ความยาว | — | 47.0 cm (18.5 in) |
| กว้างปีก | 55.2 cm (21.7 in) | 107.0 cm (42.1 in) |
| น้ำหนัก | 388.5 g (13.70 oz) | 750.0 g (26.46 oz) |
| อาหาร | -- | Fish, squid, crustaceans, offal from fishing vessels, and zooplankton. Feeds by surface-seizing and shallow plunge-diving. |
| จำนวนไข่ | 1 | 1 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
ถิ่นที่อยู่อาศัยร่วมกัน
ไม่มี
Buller's Shearwater only
Northern Fulmar only
ไม่มี
Northern Fulmar
Open ocean and sea cliffs. Breeds on cliff ledges and grassy slopes on northern coastlines. Pelagic outside breeding season.
Song & Call Comparison
Buller's Shearwater
Northern Fulmar
A nasal, cackling 'kak-kak-kak-kak' or grunting 'uh-uh-uh' at the nest and colony. Less melodic than petrels. In flight gives occasional single nasal calls.
Geographic Range & Migration
Buller's Shearwater
Northern Fulmar
North Atlantic and North Pacific oceans. Breeds from the Arctic south to Britain, France, and New England.
สถานะการอนุรักษ์
Buller's Shearwater
Northern Fulmar
How to Tell Them Apart
Buller's Shearwater
Northern Fulmar
Light morph: white head and underparts with grey wings and back. Dark morph: entirely grey. Tube-nosed bill and stiff-winged flight distinctive at sea.
Yellowish hooked bill with prominent tubular nostrils on top
About These Birds
Buller's Shearwater
46–47 cm, wingspan 96–99 cm. Distinctive; dark above with grey-white M-mark on upperwing; white below with grey cap. Breeds only Snares and Poor Knights Islands, New Zealand. Migrates to North Pacific. Near Threatened; feeds on fish and squid; gregarious at sea.
Northern Fulmar
The northern fulmar is a long-lived seabird that can survive over 40 years. It defends its nest by projectile-vomiting a foul-smelling stomach oil at intruders, which can mat the feathers of predators and cause fatal loss of waterproofing. Fulmars have expanded their breeding range dramatically southward over the past two centuries.