Common Gull-billed Tern vs Heermann's Gull
Gelochelidon nilotica so với Larus heermanni
Side-by-Side Comparison
| Thuộc Tính | Common Gull-billed Tern | Heermann's Gull |
|---|---|---|
| Tên Khoa Học | Gelochelidon nilotica | Larus heermanni |
| Bộ | Charadriiformes | Charadriiformes |
| Họ | Laridae | Laridae |
| Tình Trạng Bảo Tồn | Least Concern | Near Threatened |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 61,6 cm (24.3 in) | 67,2 cm (26.5 in) |
| Khối Lượng | 214,075 g (7.55 oz) | 448,26666666666665 g (15.81 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 1-3 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Môi Trường Sống Chung
Common Gull-billed Tern only
Heermann's Gull only
Không
Tình Trạng Bảo Tồn
Least Concern
Common Gull-billed Tern
Near Threatened
Heermann's Gull
About These Birds
Common Gull-billed Tern
Common Gull-billed Tern, 35–38 cm, wingspan 76–86 cm, has a broad global range across Europe, Asia, the Americas, and Australia. Stout black bill adapted for catching crabs, insects, and small vertebrates — atypically terrestrial for a tern. Summers in marshes and steppes; winters on tropical coasts.
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.