Heermann's Gull vs Great Black-backed Gull
Larus heermanni so với Larus marinus
Side-by-Side Comparison
| Thuộc Tính | Heermann's Gull | Great Black-backed Gull |
|---|---|---|
| Tên Khoa Học | Larus heermanni | Larus marinus |
| Bộ | Charadriiformes | Charadriiformes |
| Họ | Laridae | Laridae |
| Tình Trạng Bảo Tồn | Near Threatened | Least Concern |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 67,2 cm (26.5 in) | 95,6 cm (37.6 in) |
| Khối Lượng | 448,26666666666665 g (15.81 oz) | 1678,3333333333333 g (59.20 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 1-2 | 1-3 |
| Population Trend | — | — |
Habitat Comparison
Môi Trường Sống Chung
Heermann's Gull only
Không
Great Black-backed Gull only
Tình Trạng Bảo Tồn
Near Threatened
Heermann's Gull
Least Concern
Great Black-backed 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.
Great Black-backed Gull
Great Black-backed Gull, 61–74 cm, wingspan 142–168 cm, is the world's largest gull, breeding along North Atlantic coasts. Jet-black mantle, white body, massive yellow bill. Dominant predator among seabirds; preys on seabird chicks, puffins, rabbits, as well as scavenging. Partially migratory.