Black-bellied Storm-petrel vs Grey-backed Storm-petrel
Fregetta tropica مقارنةً بـ Garrodia nereis
Side-by-Side Comparison
| السمة | Black-bellied Storm-petrel | Grey-backed Storm-petrel |
|---|---|---|
| الاسم العلمي | Fregetta tropica | Garrodia nereis |
| الرتبة | Procellariiformes | Procellariiformes |
| الفصيلة | Oceanitidae | Oceanitidae |
| حالة الحفاظ | Least Concern | Least Concern |
| الطول | — | — |
| طول الجناح | 32,9 cm (13.0 in) | 25,0 cm (9.8 in) |
| الوزن | 53,0 g (1.87 oz) | 32,5 g (1.15 oz) |
| النظام الغذائي | -- | -- |
| عدد البيض في الوضع | 1 | 1 |
| Population Trend | — | — |
Habitat Comparison
حالة الحفاظ
Least Concern
Black-bellied Storm-petrel
Least Concern
Grey-backed Storm-petrel
About These Birds
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.
Grey-backed Storm-petrel
Grey-backed Storm-petrel, 16–19 cm, breeds on sub-Antarctic islands across the Southern Ocean from Tristan da Cunha to the Antipodes. Pale grey back and rump distinguishes it from most other storm-petrels. Planktivore; flutters low over the sea surface picking up zooplankton.