Black-billed Gull vs Heermann's Gull
Larus bulleri verglichen mit Larus heermanni
Side-by-Side Comparison
| Merkmal | Black-billed Gull | Heermann's Gull |
|---|---|---|
| Wissenschaftlicher Name | Larus bulleri | Larus heermanni |
| Ordnung | Charadriiformes | Charadriiformes |
| Familie | Laridae | Laridae |
| Erhaltungsstatus | Near Threatened | Near Threatened |
| Länge | — | — |
| Flügelspannweite | 57,5 cm (22.6 in) | 67,2 cm (26.5 in) |
| Gewicht | 216,83333333333334 g (7.65 oz) | 448,26666666666665 g (15.81 oz) |
| Ernährung | -- | -- |
| Gelegegröße | 1-3 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Erhaltungsstatus
Near Threatened
Black-billed Gull
Near Threatened
Heermann's Gull
About These Birds
Black-billed Gull
Black-billed Gull, 35–38 cm, is endemic to New Zealand, breeding on South Island braided riverbeds. All-white plumage with a slender black bill and black-tipped wings. Endangered; river modification and mammal predation depress breeding success. Insectivore and piscivore in river and coastal habitats.
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.