Heermann's Gull vs Bonaparte's Gull
Larus heermanni verglichen mit Larus philadelphia
Side-by-Side Comparison
| Merkmal | Heermann's Gull | Bonaparte's Gull |
|---|---|---|
| Wissenschaftlicher Name | Larus heermanni | Larus philadelphia |
| Ordnung | Charadriiformes | Charadriiformes |
| Familie | Laridae | Laridae |
| Erhaltungsstatus | Near Threatened | Least Concern |
| Länge | — | — |
| Flügelspannweite | 67,2 cm (26.5 in) | 51,9 cm (20.4 in) |
| Gewicht | 448,26666666666665 g (15.81 oz) | 204,575 g (7.22 oz) |
| Ernährung | -- | -- |
| Gelegegröße | 1-2 | 1-3 |
| Population Trend | — | — |
Habitat Comparison
Gemeinsame Lebensräume
Heermann's Gull only
-
Bonaparte's Gull only
Erhaltungsstatus
Near Threatened
Heermann's Gull
Least Concern
Bonaparte'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.
Bonaparte's Gull
Bonaparte's Gull, 28–30 cm, is North America's smallest Larus gull, breeding in boreal forests near lakes and wintering on both coasts. Breeding adult has a black hood; underwing shows white triangular flash. Planktivore and piscivore; buoyant, tern-like flight. Migratory; forms large winter flocks.