White-bellied Storm-petrel vs Black-bellied Storm-petrel
Fregetta grallaria в сравнении с Fregetta tropica
Side-by-Side Comparison
| Характеристика | White-bellied Storm-petrel | Black-bellied Storm-petrel |
|---|---|---|
| Научное название | Fregetta grallaria | Fregetta tropica |
| Отряд | Procellariiformes | Procellariiformes |
| Семейство | Oceanitidae | Oceanitidae |
| Охранный статус | Least Concern | Least Concern |
| Длина | — | — |
| Размах крыльев | 33,7 cm (13.3 in) | 32,9 cm (13.0 in) |
| Масса | 53,9 g (1.90 oz) | 53,0 g (1.87 oz) |
| Питание | -- | -- |
| Размер кладки | 1 | 1 |
| Population Trend | — | — |
Habitat Comparison
Общие среды обитания
Нет
White-bellied Storm-petrel only
Black-bellied Storm-petrel only
Нет
Охранный статус
Least Concern
White-bellied Storm-petrel
Least Concern
Black-bellied 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.
Black-bellied Storm-petrel
Black-bellied Storm-petrel, 19–21 cm, breeds on sub-Antarctic islands and disperses widely across the Southern Ocean. Dark above with white rump; distinctive black streak through the white belly. Patters over wave surfaces picking up plankton. Long-distance pelagic movements after breeding.