White-bellied Storm-petrel vs Polynesian Storm-petrel
Fregetta grallaria so với Nesofregetta fuliginosa
Side-by-Side Comparison
| Thuộc Tính | White-bellied Storm-petrel | Polynesian Storm-petrel |
|---|---|---|
| Tên Khoa Học | Fregetta grallaria | Nesofregetta fuliginosa |
| Bộ | Procellariiformes | Procellariiformes |
| Họ | Oceanitidae | Oceanitidae |
| Tình Trạng Bảo Tồn | Least Concern | Endangered |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 33,7 cm (13.3 in) | 39,5 cm (15.6 in) |
| Khối Lượng | 53,9 g (1.90 oz) | 71,0 g (2.50 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 1 | 1 |
| Population Trend | — | — |
Habitat Comparison
Môi Trường Sống Chung
Không
White-bellied Storm-petrel only
Polynesian Storm-petrel only
Tình Trạng Bảo Tồn
Least Concern
White-bellied Storm-petrel
Endangered
Polynesian Storm-petrel
About These Birds
White-bellied Storm-petrel
White-bellied Storm-petrel, 18–21 cm, breeds on sub-Antarctic and South Atlantic islands; pelagic across the Southern Ocean in winter. White belly contrasts with dark breast band and dark upperparts; pale at base of rump. Planktivore; patters over sea surface. Often seen in the company of Wilson's Storm-petrel.
Polynesian Storm-petrel
Polynesian Storm-petrel, 25–26 cm, is the largest storm-petrel, breeding on tropical Pacific islands from the Marquesas to the Cook Islands. Two morphs: dark and white-bellied. Flies with distinctive high bounding style. Vulnerable; predated by introduced rats and cats on nesting islands. Planktivore.