Black Tern vs Heermann's Gull
Chlidonias niger в сравнении с Larus heermanni
Side-by-Side Comparison
| Характеристика | Black Tern | Heermann's Gull |
|---|---|---|
| Научное название | Chlidonias niger | Larus heermanni |
| Отряд | Charadriiformes | Charadriiformes |
| Семейство | Laridae | Laridae |
| Охранный статус | Least Concern | Near Threatened |
| Длина | — | — |
| Размах крыльев | 40,3 cm (15.9 in) | 67,2 cm (26.5 in) |
| Масса | 73,15 g (2.58 oz) | 448,26666666666665 g (15.81 oz) |
| Питание | -- | -- |
| Размер кладки | 2-3 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Охранный статус
Least Concern
Black Tern
Near Threatened
Heermann's Gull
About These Birds
Black Tern
Black Tern, 22–24 cm, breeds on freshwater marshes of North America and Eurasia. Breeding plumage: sooty black body, grey wings. Insectivore and piscivore; buoyant, dipping flight over wetlands. Migratory; winters off West African coasts and in tropical America. Declining in Europe.
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.