Heermann's Gull vs Black Skimmer
Larus heermanni مقارنةً بـ Rynchops niger
Side-by-Side Comparison
| السمة | Heermann's Gull | Black Skimmer |
|---|---|---|
| الاسم العلمي | Larus heermanni | Rynchops niger |
| الرتبة | Charadriiformes | Charadriiformes |
| الفصيلة | Laridae | Laridae |
| حالة الحفاظ | Near Threatened | Least Concern |
| الطول | — | — |
| طول الجناح | 67,2 cm (26.5 in) | 73,1 cm (28.8 in) |
| الوزن | 448,26666666666665 g (15.81 oz) | 293,6666666666667 g (10.36 oz) |
| النظام الغذائي | -- | -- |
| عدد البيض في الوضع | 1-2 | 1-6 |
| Population Trend | — | — |
Habitat Comparison
حالة الحفاظ
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.