Heermann's Gull vs Aleutian Tern
Larus heermanni ile kıyaslandığında Onychoprion aleuticus
Side-by-Side Comparison
| Özellik | Heermann's Gull | Aleutian Tern |
|---|---|---|
| Bilimsel Ad | Larus heermanni | Onychoprion aleuticus |
| Takım | Charadriiformes | Charadriiformes |
| Familya | Laridae | Laridae |
| Koruma Durumu | Near Threatened | Vulnerable |
| Uzunluk | — | — |
| Kanat Açıklığı | 67,2 cm (26.5 in) | 52,4 cm (20.6 in) |
| Ağırlık | 448,26666666666665 g (15.81 oz) | 104,88 g (3.70 oz) |
| Beslenme | -- | -- |
| Kuluçka Büyüklüğü | 1-2 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
Ortak Yaşam Alanları
Heermann's Gull only
Hiçbiri
Aleutian Tern only
Koruma Durumu
Near Threatened
Heermann's Gull
Vulnerable
Aleutian 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.
Aleutian Tern
Aleutian Tern, 32–34 cm, breeds colonially in Alaska and Russian Far East, wintering in Southeast Asian waters — one of the most poorly tracked migrations among seabirds. Dark grey above, white below, black cap with white forehead. Piscivore; dives for small fish. Near Threatened.