Glaucous-winged Gull vs Heermann's Gull
Larus glaucescens в сравнении с Larus heermanni
Side-by-Side Comparison
| Характеристика | Glaucous-winged Gull | Heermann's Gull |
|---|---|---|
| Научное название | Larus glaucescens | Larus heermanni |
| Отряд | Charadriiformes | Charadriiformes |
| Семейство | Laridae | Laridae |
| Охранный статус | Least Concern | Near Threatened |
| Длина | — | — |
| Размах крыльев | 82,4 cm (32.4 in) | 67,2 cm (26.5 in) |
| Масса | 1095,0166666666667 g (38.63 oz) | 448,26666666666665 g (15.81 oz) |
| Питание | -- | -- |
| Размер кладки | 1-6 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Охранный статус
Least Concern
Glaucous-winged Gull
Near Threatened
Heermann's Gull
About These Birds
Glaucous-winged Gull
Glaucous-winged Gull, 56–68 cm, is the common large gull of the North Pacific from Alaska to California. Distinctive pale grey wing tips (not black) give a uniform grey appearance. Omnivore; forages on rocky shores and at harbours. Hybridises with Western, Herring, and Glaucous Gulls.
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.