Great Shearwater vs Pycroft's Petrel
Ardenna gravis so với Pterodroma pycrofti
Side-by-Side Comparison
| Thuộc Tính | Great Shearwater | Pycroft's Petrel |
|---|---|---|
| Tên Khoa Học | Ardenna gravis | Pterodroma pycrofti |
| Bộ | Procellariiformes | Procellariiformes |
| Họ | Procellariidae | Procellariidae |
| Tình Trạng Bảo Tồn | Least Concern | Vulnerable |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 63,6 cm (25.0 in) | 42,8 cm (16.9 in) |
| Khối Lượng | 832,5 g (29.37 oz) | 156,5 g (5.52 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 1 | 1 |
| Population Trend | — | — |
Habitat Comparison
Môi Trường Sống Chung
Không
Great Shearwater only
Pycroft's Petrel only
Tình Trạng Bảo Tồn
Least Concern
Great Shearwater
Vulnerable
Pycroft's Petrel
About These Birds
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.
Pycroft's Petrel
26–28 cm. Small; pale grey above with dark M-mark; white underparts with partial dark collar. Breeds small islands off northern New Zealand (Poor Knights, Hen & Chickens). Vulnerable; migrates to North Pacific. Feeds on squid and fish; nocturnal at colonies; threatened by rats.