Heermann's Gull vs Franklin's Gull
Larus heermanni so với Larus pipixcan
Side-by-Side Comparison
| Thuộc Tính | Heermann's Gull | Franklin's Gull |
|---|---|---|
| Tên Khoa Học | Larus heermanni | Larus pipixcan |
| 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) | 55,9 cm (22.0 in) |
| Khối Lượng | 448,26666666666665 g (15.81 oz) | 279,8333333333333 g (9.87 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 1-2 | 1-3 |
| Population Trend | — | — |
Habitat Comparison
Môi Trường Sống Chung
Heermann's Gull only
Không
Franklin's Gull only
Tình Trạng Bảo Tồn
Near Threatened
Heermann's Gull
Least Concern
Franklin'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.
Franklin's Gull
Franklin's Gull, 32–36 cm, makes one of the longest overland migrations of any gull, breeding on prairie marshes of North America and wintering on Pacific coasts of South America — a journey of 12,000+ km. Rosy-flushed underparts in spring; black hood with distinctive white eye-crescents. Insectivore.