White-bellied Storm-petrel vs Wilson's Storm-petrel
Fregetta grallaria compared with Oceanites oceanicus
Side-by-Side Comparison
| Attribute | White-bellied Storm-petrel | Wilson's Storm-petrel |
|---|---|---|
| Scientific Name | Fregetta grallaria | Oceanites oceanicus |
| Order | Procellariiformes | Procellariiformes |
| Family | Oceanitidae | Oceanitidae |
| Conservation Status | Least Concern | Least Concern |
| Length | — | — |
| Wingspan | 33.7 cm (13.3 in) | 29.4 cm (11.6 in) |
| Weight | 53.9 g (1.90 oz) | 37.5 g (1.32 oz) |
| Diet | -- | -- |
| Clutch Size | 1 | 1 |
| Population Trend | — | — |
Habitat Comparison
Conservation Status
Least Concern
White-bellied Storm-petrel
Least Concern
Wilson's 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.
Wilson's Storm-petrel
Wilson's Storm-petrel, 15–19 cm, wingspan 38–42 cm, may be the world's most abundant bird with billions breeding on Antarctic and sub-Antarctic islands. Dark brown with white rump, yellow-webbed feet dangling below body while 'walking' on water surface. Planktivore; skims copepods and krill. Circumglobal migrant.