Heermann's Gull vs Silver Gull
Larus heermanni so với Larus novaehollandiae
Side-by-Side Comparison
| Thuộc Tính | Heermann's Gull | Silver Gull |
|---|---|---|
| Tên Khoa Học | Larus heermanni | Larus novaehollandiae |
| 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) | 55,5 cm (21.9 in) |
| Khối Lượng | 448,26666666666665 g (15.81 oz) | 285,3333333333333 g (10.06 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 1-2 | 1-5 |
| Population Trend | — | — |
Habitat Comparison
Tình Trạng Bảo Tồn
Near Threatened
Heermann's Gull
Least Concern
Silver 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.
Silver Gull
Silver Gull, 36–44 cm, is Australia's most familiar gull, present year-round on all coasts and increasingly inland. White body, grey mantle, red bill and legs. Opportunistic omnivore; thrives on human food waste and follows fishing boats. Expanding range inland as irrigation provides new habitat.