Great Shearwater vs Small Saint Helena Petrel

Ardenna gravis مقارنةً بـ Bulweria bifax

Side-by-Side Comparison

السمة Great Shearwater Small Saint Helena Petrel
الاسم العلمي Ardenna gravis Bulweria bifax
الرتبة Procellariiformes Procellariiformes
الفصيلة Procellariidae Procellariidae
حالة الحفاظ Least Concern Extinct
الطول
طول الجناح 63,6 cm (25.0 in)
الوزن 832,5 g (29.37 oz) 167,17 g (5.90 oz)
النظام الغذائي -- --
عدد البيض في الوضع 1 1
Population Trend

Habitat Comparison

الموائل المشتركة

بلا

Great Shearwater only

Small Saint Helena Petrel only

بلا

حالة الحفاظ

Least Concern

Great Shearwater

Extinct

Small Saint Helena Petrel

About These Birds

Great Shearwater

43–51 cm, wingspan 105–122 cm. Large; dark brown above with white underparts, dark cap, and distinctive scaly pattern on upperwing. Breeds Tristan da Cunha, Gough, and Falklands; migrates to North Atlantic. Feeds on fish and squid; spectacular post-breeding migration past UK coasts.

Small Saint Helena Petrel

Extinct; known only from subfossil bones from St. Helena Island. Smaller than Bulwer's Petrel; went extinct shortly after human settlement of St. Helena, likely from introduced predators. Part of the endemic St. Helena seabird community that was largely extirpated by human arrival.

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