Heermann's Gull vs Black Skimmer
Larus heermanni в сравнении с Rynchops niger
Side-by-Side Comparison
| Характеристика | Heermann's Gull | Black Skimmer |
|---|---|---|
| Научное название | Larus heermanni | Rynchops niger |
| Отряд | Charadriiformes | Charadriiformes |
| Семейство | Laridae | Laridae |
| Охранный статус | Near Threatened | Least Concern |
| Длина | — | — |
| Размах крыльев | 67,2 cm (26.5 in) | 73,1 cm (28.8 in) |
| Масса | 448,26666666666665 g (15.81 oz) | 293,6666666666667 g (10.36 oz) |
| Питание | -- | -- |
| Размер кладки | 1-2 | 1-6 |
| Population Trend | — | — |
Habitat Comparison
Охранный статус
Near Threatened
Heermann's Gull
Least Concern
Black Skimmer
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.
Black Skimmer
Black Skimmer: 40–50 cm, the largest skimmer with jet black upperparts, white underparts, and an outsized red-and-black bill with protruding lower mandible. Inhabits large rivers, estuaries, and coastal lagoons of North and South America. Feeds at dawn and dusk by skimming water surface. Nests colonially on sandy beaches. Partly migratory.