Heermann's Gull vs Royal Tern
Larus heermanni so với Thalasseus maximus
Side-by-Side Comparison
| Thuộc Tính | Heermann's Gull | Royal Tern |
|---|---|---|
| Tên Khoa Học | Larus heermanni | Thalasseus maximus |
| 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) | 72,7 cm (28.6 in) |
| Khối Lượng | 448,26666666666665 g (15.81 oz) | 402,3333333333333 g (14.19 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 1-2 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Tình Trạng Bảo Tồn
Near Threatened
Heermann's Gull
Least Concern
Royal 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.
Royal Tern
Royal Tern, 45–50 cm, is a large, powerful tern of American and West African coasts. Orange bill, shaggy black crest (full only briefly in spring), pale grey mantle. Piscivore; plunge-dives from 10 m for mullet and menhaden. Nests in dense colonies; often seen loafing on beaches year-round.