Heermann's Gull vs Common Tern
Larus heermanni so với Sterna hirundo
Side-by-Side Comparison
| Thuộc Tính | Heermann's Gull | Common Tern |
|---|---|---|
| Tên Khoa Học | Larus heermanni | Sterna hirundo |
| 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) | 50,7 cm (20.0 in) |
| Khối Lượng | 448,26666666666665 g (15.81 oz) | 125,75 g (4.44 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 1-2 | 2-3 |
| Population Trend | — | — |
Habitat Comparison
Tình Trạng Bảo Tồn
Near Threatened
Heermann's Gull
Least Concern
Common 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.
Common Tern
Common Tern, 31–35 cm, wingspan 77–98 cm, is among the most widespread seabirds, breeding across the Holarctic and wintering in the Southern Hemisphere. Grey back, white below, orange-red bill with dark tip, black cap. Plunge-dives for fish. One of the longest-distance migrants in the Northern Hemisphere.