Buller's Shearwater vs Great Shearwater
Ardenna bulleri so với Ardenna gravis
Side-by-Side Comparison
| Thuộc Tính | Buller's Shearwater | Great Shearwater |
|---|---|---|
| Tên Khoa Học | Ardenna bulleri | Ardenna gravis |
| Bộ | Procellariiformes | Procellariiformes |
| Họ | Procellariidae | Procellariidae |
| Tình Trạng Bảo Tồn | Vulnerable | Least Concern |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 55,2 cm (21.7 in) | 63,6 cm (25.0 in) |
| Khối Lượng | 388,5 g (13.70 oz) | 832,5 g (29.37 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 1 | 1 |
| Population Trend | — | — |
Habitat Comparison
Môi Trường Sống Chung
Không
Buller's Shearwater only
Great Shearwater only
Tình Trạng Bảo Tồn
Vulnerable
Buller's Shearwater
Least Concern
Great Shearwater
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.
Great Shearwater
43–51 cm, wingspan 105–122 cm. Large; dark brown above with white underparts, dark cap, and distinctive scaly pattern on upperwing. Breeds Tristan da Cunha, Gough, and Falklands; migrates to North Atlantic. Feeds on fish and squid; spectacular post-breeding migration past UK coasts.