Heermann's Gull vs Yellow-billed Tern
Larus heermanni مقارنةً بـ Sternula superciliaris
Side-by-Side Comparison
| السمة | Heermann's Gull | Yellow-billed Tern |
|---|---|---|
| الاسم العلمي | Larus heermanni | Sternula superciliaris |
| الرتبة | Charadriiformes | Charadriiformes |
| الفصيلة | Laridae | Laridae |
| حالة الحفاظ | Near Threatened | Least Concern |
| الطول | — | — |
| طول الجناح | 67,2 cm (26.5 in) | 33,8 cm (13.3 in) |
| الوزن | 448,26666666666665 g (15.81 oz) | 47,800000000000004 g (1.69 oz) |
| النظام الغذائي | -- | -- |
| عدد البيض في الوضع | 1-2 | 2-3 |
| Population Trend | — | — |
Habitat Comparison
حالة الحفاظ
Near Threatened
Heermann's Gull
Least Concern
Yellow-billed Tern
About These Birds
Heermann's Gull
Heermann's Gull, 46–51 cm, is distinctive — dark grey body, white head (breeding), red bill. Breeds almost entirely on Isla Rasa in the Gulf of California, then disperses north along the Pacific coast to British Columbia. Kleptoparasite; steals fish from Brown Pelicans. Near Threatened; range highly restricted.
Yellow-billed Tern
Yellow-billed Tern, 22–24 cm, is a freshwater tern of the Amazon and Orinoco river systems in South America. Yellow bill and legs, grey back, black cap. Piscivore; hovers over rivers and lakes, diving for small fish. Resident year-round along major tropical waterways.