Aleutian Tern vs Roseate Tern
Onychoprion aleuticus مقارنةً بـ Sterna dougallii
Side-by-Side Comparison
| السمة | Aleutian Tern | Roseate Tern |
|---|---|---|
| الاسم العلمي | Onychoprion aleuticus | Sterna dougallii |
| الرتبة | Charadriiformes | Charadriiformes |
| الفصيلة | Laridae | Laridae |
| حالة الحفاظ | Vulnerable | Least Concern |
| الطول | — | — |
| طول الجناح | 52,4 cm (20.6 in) | 44,8 cm (17.6 in) |
| الوزن | 104,88 g (3.70 oz) | 114,33333333333333 g (4.03 oz) |
| النظام الغذائي | -- | -- |
| عدد البيض في الوضع | 1-4 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
حالة الحفاظ
Vulnerable
Aleutian Tern
Least Concern
Roseate Tern
About These Birds
Aleutian Tern
Aleutian Tern, 32–34 cm, breeds colonially in Alaska and Russian Far East, wintering in Southeast Asian waters — one of the most poorly tracked migrations among seabirds. Dark grey above, white below, black cap with white forehead. Piscivore; dives for small fish. Near Threatened.
Roseate Tern
Roseate Tern, 33–36 cm, is a globally distributed but declining species, breeding on both sides of the Atlantic, Indian Ocean, and Pacific. Nearly white with a rosy flush to breast in spring, very long tail streamers, and mostly black bill. Plunge-dives for small fish. Endangered in parts of range.