Atlantic White Tern vs Heermann's Gull
Gygis alba в сравнении с Larus heermanni
Side-by-Side Comparison
| Характеристика | Atlantic White Tern | Heermann's Gull |
|---|---|---|
| Научное название | Gygis alba | Larus heermanni |
| Отряд | Charadriiformes | Charadriiformes |
| Семейство | Laridae | Laridae |
| Охранный статус | Least Concern | Near Threatened |
| Длина | — | — |
| Размах крыльев | 50,4 cm (19.8 in) | 67,2 cm (26.5 in) |
| Масса | 138,0 g (4.87 oz) | 448,26666666666665 g (15.81 oz) |
| Питание | -- | -- |
| Размер кладки | 1 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Охранный статус
Least Concern
Atlantic White Tern
Near Threatened
Heermann's Gull
About These Birds
Atlantic White Tern
Atlantic White Tern: 28–33 cm, wingspan 76–87 cm, ethereally white seabird with blue-grey bill, blue orbital ring, and large dark eyes. Breeds on tropical Atlantic islands including Ascension and Saint Helena; related species widespread across the Indo-Pacific. Nests on bare branches with no nest material. Feeds on small fish near the surface.
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.