Caspian Tern vs Heermann's Gull
Hydroprogne caspia so với Larus heermanni
Side-by-Side Comparison
| Thuộc Tính | Caspian Tern | Heermann's Gull |
|---|---|---|
| Tên Khoa Học | Hydroprogne caspia | Larus heermanni |
| Bộ | Charadriiformes | Charadriiformes |
| Họ | Laridae | Laridae |
| Tình Trạng Bảo Tồn | Least Concern | Near Threatened |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 82,1 cm (32.3 in) | 67,2 cm (26.5 in) |
| Khối Lượng | 656,0 g (23.14 oz) | 448,26666666666665 g (15.81 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 2-4 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Tình Trạng Bảo Tồn
Least Concern
Caspian Tern
Near Threatened
Heermann's Gull
About These Birds
Caspian Tern
Caspian Tern is the world's largest tern, 48–56 cm, wingspan 127–140 cm, with a massive blood-red bill. Found on all continents except Antarctica. Plunge-dives powerfully for large fish in coastal and freshwater habitats. Migratory; northern populations winter in the tropics. Loud, rasping call.
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.