Heermann's Gull vs Sooty Tern
Larus heermanni so với Onychoprion fuscatus
Side-by-Side Comparison
| Thuộc Tính | Heermann's Gull | Sooty Tern |
|---|---|---|
| Tên Khoa Học | Larus heermanni | Onychoprion fuscatus |
| 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) | 56,1 cm (22.1 in) |
| Khối Lượng | 448,26666666666665 g (15.81 oz) | 183,0 g (6.46 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 1-2 | 1 |
| Population Trend | — | — |
Habitat Comparison
Tình Trạng Bảo Tồn
Near Threatened
Heermann's Gull
Least Concern
Sooty 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.
Sooty Tern
Sooty Tern is a highly pelagic tern, 33–36 cm, wingspan 82–94 cm, breeding pantropically on oceanic islands. Jet-black above, white below, with a white forehead patch. Among the most aerial of birds; rarely lands on water. Piscivore; snaps fish and squid at the surface during mass prey events.