Heermann's Gull vs Black-bellied Tern
Larus heermanni ile kıyaslandığında Sterna acuticauda
Side-by-Side Comparison
| Özellik | Heermann's Gull | Black-bellied Tern |
|---|---|---|
| Bilimsel Ad | Larus heermanni | Sterna acuticauda |
| Takım | Charadriiformes | Charadriiformes |
| Familya | Laridae | Laridae |
| Koruma Durumu | Near Threatened | Endangered |
| Uzunluk | — | — |
| Kanat Açıklığı | 67,2 cm (26.5 in) | 44,8 cm (17.6 in) |
| Ağırlık | 448,26666666666665 g (15.81 oz) | 159,5 g (5.63 oz) |
| Beslenme | -- | -- |
| Kuluçka Büyüklüğü | 1-2 | 2-3 |
| Population Trend | — | — |
Habitat Comparison
Koruma Durumu
Near Threatened
Heermann's Gull
Endangered
Black-bellied Tern
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-bellied Tern
Black-bellied Tern, 32–34 cm, is an Endangered freshwater tern of the Indian subcontinent, breeding on large river sandbars from Pakistan to Myanmar. Black belly contrasts with grey upperparts in breeding plumage; orange bill. Plunge-dives for small fish. Severely threatened by river modification.