Heermann's Gull vs Ross's Gull
Larus heermanni в сравнении с Rhodostethia rosea
Side-by-Side Comparison
| Характеристика | Heermann's Gull | Ross's Gull |
|---|---|---|
| Научное название | Larus heermanni | Rhodostethia rosea |
| Отряд | Charadriiformes | Charadriiformes |
| Семейство | Laridae | Laridae |
| Охранный статус | Near Threatened | Least Concern |
| Длина | — | — |
| Размах крыльев | 67,2 cm (26.5 in) | 50,2 cm (19.8 in) |
| Масса | 448,26666666666665 g (15.81 oz) | 185,0 g (6.53 oz) |
| Питание | -- | -- |
| Размер кладки | 1-2 | 1-3 |
| Population Trend | — | — |
Habitat Comparison
Охранный статус
Near Threatened
Heermann's Gull
Least Concern
Ross'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.
Ross's Gull
Ross's Gull, 29–32 cm, is a delicate Arctic gull breeding in Siberian tundra, with its winter range largely unknown — possibly far out in the pack ice. Rosy flush to underparts in breeding plumage; wedge-shaped tail; black neck ring. Feeds on invertebrates and small fish along ice edges.