Heermann's Gull vs Ross's Gull
Larus heermanni เปรียบเทียบกับ Rhodostethia rosea
Side-by-Side Comparison
| คุณสมบัติ | Heermann's Gull | Ross's Gull |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Larus heermanni | Rhodostethia rosea |
| อันดับ | Charadriiformes | Charadriiformes |
| วงศ์ตระกูล | Laridae | Laridae |
| สถานะการอนุรักษ์ | Near Threatened | Least Concern |
| ความยาว | — | — |
| กว้างปีก | 67.2 cm (26.5 in) | 50.2 cm (19.8 in) |
| น้ำหนัก | 448.26666666666665 g (15.81 oz) | 185.0 g (6.53 oz) |
| อาหาร | -- | -- |
| จำนวนไข่ | 1-2 | 1-3 |
| Population Trend | — | — |
Habitat Comparison
สถานะการอนุรักษ์
Near Threatened
Heermann's Gull
Least Concern
Ross's Gull
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.
Ross's Gull
Ross's Gull, 29–32 cm, is a delicate Arctic gull breeding in Siberian tundra, with its winter range largely unknown — possibly far out in the pack ice. Rosy flush to underparts in breeding plumage; wedge-shaped tail; black neck ring. Feeds on invertebrates and small fish along ice edges.