Hartlaub's Gull vs Aleutian Tern
Larus hartlaubii в сравнении с Onychoprion aleuticus
Side-by-Side Comparison
| Характеристика | Hartlaub's Gull | Aleutian Tern |
|---|---|---|
| Научное название | Larus hartlaubii | Onychoprion aleuticus |
| Отряд | Charadriiformes | Charadriiformes |
| Семейство | Laridae | Laridae |
| Охранный статус | Least Concern | Vulnerable |
| Длина | — | — |
| Размах крыльев | 54,0 cm (21.3 in) | 52,4 cm (20.6 in) |
| Масса | 287,5 g (10.14 oz) | 104,88 g (3.70 oz) |
| Питание | -- | -- |
| Размер кладки | 1-5 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
Охранный статус
Least Concern
Hartlaub's Gull
Vulnerable
Aleutian Tern
About These Birds
Hartlaub's Gull
Hartlaub's Gull, 38–40 cm, is endemic to the Benguela Current coast of Namibia and South Africa. White with grey mantle, dark red bill. Resident; forages on beaches, at harbours, and over cold upwelling waters for fish offal and marine invertebrates. Population stable but range 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.