Heermann's Gull vs Bonaparte's Gull
Larus heermanni в сравнении с Larus philadelphia
Side-by-Side Comparison
| Характеристика | Heermann's Gull | Bonaparte's Gull |
|---|---|---|
| Научное название | Larus heermanni | Larus philadelphia |
| Отряд | Charadriiformes | Charadriiformes |
| Семейство | Laridae | Laridae |
| Охранный статус | Near Threatened | Least Concern |
| Длина | — | — |
| Размах крыльев | 67,2 cm (26.5 in) | 51,9 cm (20.4 in) |
| Масса | 448,26666666666665 g (15.81 oz) | 204,575 g (7.22 oz) |
| Питание | -- | -- |
| Размер кладки | 1-2 | 1-3 |
| Population Trend | — | — |
Habitat Comparison
Общие среды обитания
Heermann's Gull only
Нет
Bonaparte's Gull only
Охранный статус
Near Threatened
Heermann's Gull
Least Concern
Bonaparte's Gull
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.
Bonaparte's Gull
Bonaparte's Gull, 28–30 cm, is North America's smallest Larus gull, breeding in boreal forests near lakes and wintering on both coasts. Breeding adult has a black hood; underwing shows white triangular flash. Planktivore and piscivore; buoyant, tern-like flight. Migratory; forms large winter flocks.