Glaucous-winged Gull vs Heermann's Gull
Larus glaucescens เปรียบเทียบกับ Larus heermanni
Side-by-Side Comparison
| คุณสมบัติ | Glaucous-winged Gull | Heermann's Gull |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Larus glaucescens | Larus heermanni |
| อันดับ | Charadriiformes | Charadriiformes |
| วงศ์ตระกูล | Laridae | Laridae |
| สถานะการอนุรักษ์ | Least Concern | Near Threatened |
| ความยาว | — | — |
| กว้างปีก | 82.4 cm (32.4 in) | 67.2 cm (26.5 in) |
| น้ำหนัก | 1095.0166666666667 g (38.63 oz) | 448.26666666666665 g (15.81 oz) |
| อาหาร | -- | -- |
| จำนวนไข่ | 1-6 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
สถานะการอนุรักษ์
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.