White-bellied Storm-petrel vs Polynesian Storm-petrel
Fregetta grallaria compared with Nesofregetta fuliginosa
Side-by-Side Comparison
| Attribute | White-bellied Storm-petrel | Polynesian Storm-petrel |
|---|---|---|
| Scientific Name | Fregetta grallaria | Nesofregetta fuliginosa |
| Order | Procellariiformes | Procellariiformes |
| Family | Oceanitidae | Oceanitidae |
| Conservation Status | Least Concern | Endangered |
| Length | — | — |
| Wingspan | 33.7 cm (13.3 in) | 39.5 cm (15.6 in) |
| Weight | 53.9 g (1.90 oz) | 71.0 g (2.50 oz) |
| Diet | -- | -- |
| Clutch Size | 1 | 1 |
| Population Trend | — | — |
Habitat Comparison
Shared Habitats
None
White-bellied Storm-petrel only
Polynesian Storm-petrel only
Conservation Status
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.