Heermann's Gull vs Ivory Gull
Larus heermanni so với Pagophila eburnea
Side-by-Side Comparison
| Thuộc Tính | Heermann's Gull | Ivory Gull |
|---|---|---|
| Tên Khoa Học | Larus heermanni | Pagophila eburnea |
| Bộ | Charadriiformes | Charadriiformes |
| Họ | Laridae | Laridae |
| Tình Trạng Bảo Tồn | Near Threatened | Near Threatened |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 67,2 cm (26.5 in) | 66,7 cm (26.3 in) |
| Khối Lượng | 448,26666666666665 g (15.81 oz) | 578,3333333333334 g (20.40 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 1-2 | 2 |
| Population Trend | — | — |
Habitat Comparison
Tình Trạng Bảo Tồn
Near Threatened
Heermann's Gull
Near Threatened
Ivory 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.
Ivory Gull
Ivory Gull, 40–43 cm, is entirely white with black legs, breeding only on High Arctic ice caps and cliffs in Canada, Greenland, Svalbard, and Russia. Winters at sea ice edges in the High Arctic. Scavenges on marine mammal carcasses and sea ice invertebrates. Near Threatened; climate-sensitive.