Heermann's Gull vs Bonaparte's Gull
Larus heermanni so với Larus philadelphia
Side-by-Side Comparison
| Thuộc Tính | Heermann's Gull | Bonaparte's Gull |
|---|---|---|
| Tên Khoa Học | Larus heermanni | Larus philadelphia |
| 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) | 51,9 cm (20.4 in) |
| Khối Lượng | 448,26666666666665 g (15.81 oz) | 204,575 g (7.22 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 1-2 | 1-3 |
| Population Trend | — | — |
Habitat Comparison
Môi Trường Sống Chung
Heermann's Gull only
Không
Bonaparte's Gull only
Tình Trạng Bảo Tồn
Near Threatened
Heermann's Gull
Least Concern
Bonaparte's 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.
Bonaparte's Gull
Bonaparte's Gull, 28–30 cm, is North America's smallest Larus gull, breeding in boreal forests near lakes and wintering on both coasts. Breeding adult has a black hood; underwing shows white triangular flash. Planktivore and piscivore; buoyant, tern-like flight. Migratory; forms large winter flocks.