Heermann's Gull vs Slaty-backed Gull
Larus heermanni เปรียบเทียบกับ Larus schistisagus
Side-by-Side Comparison
| คุณสมบัติ | Heermann's Gull | Slaty-backed Gull |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Larus heermanni | Larus schistisagus |
| อันดับ | Charadriiformes | Charadriiformes |
| วงศ์ตระกูล | Laridae | Laridae |
| สถานะการอนุรักษ์ | Near Threatened | Least Concern |
| ความยาว | — | — |
| กว้างปีก | 67.2 cm (26.5 in) | 87.0 cm (34.3 in) |
| น้ำหนัก | 448.26666666666665 g (15.81 oz) | 1280.5 g (45.17 oz) |
| อาหาร | -- | -- |
| จำนวนไข่ | 1-2 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
สถานะการอนุรักษ์
Near Threatened
Heermann's Gull
Least Concern
Slaty-backed 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.
Slaty-backed Gull
Slaty-backed Gull, 55–68 cm, breeds on coasts and cliffs of the Russian Far East, wintering south to Japan and occasionally the US Pacific coast. Dark slate-grey mantle, pink legs, 'string of pearls' white mirrors on outer wing. Omnivore; scavenges at fishing ports in East Asian harbours.