Heermann's Gull vs Elegant Tern
Larus heermanni so với Thalasseus elegans
Side-by-Side Comparison
| Thuộc Tính | Heermann's Gull | Elegant Tern |
|---|---|---|
| Tên Khoa Học | Larus heermanni | Thalasseus elegans |
| Bộ | Charadriiformes | Charadriiformes |
| Họ | Laridae | Laridae |
| Tình Trạng Bảo Tồn | Near Threatened | Near Threatened |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 67,2 cm (26.5 in) | 59,3 cm (23.3 in) |
| Khối Lượng | 448,26666666666665 g (15.81 oz) | 236,16666666666666 g (8.33 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 1-2 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Tình Trạng Bảo Tồn
Near Threatened
Heermann's Gull
Near Threatened
Elegant Tern
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.
Elegant Tern
Elegant Tern, 39–43 cm, breeds in a few large colonies on islands off Baja California and winters along Pacific coasts of South America. Long, drooping orange bill, shaggy black crest. Piscivore; dependent on Northern Anchovy and Pacific Sardine. Near Threatened; highly colonial breeder.