Swallow-tailed Gull vs Black-tailed Gull
Creagrus furcatus से तुलना Larus crassirostris
Side-by-Side Comparison
| विशेषता | Swallow-tailed Gull | Black-tailed Gull |
|---|---|---|
| वैज्ञानिक नाम | Creagrus furcatus | Larus crassirostris |
| गण | Charadriiformes | Charadriiformes |
| कुल | Laridae | Laridae |
| संरक्षण स्थिति | Least Concern | Least Concern |
| लंबाई | — | — |
| पंखों का फैलाव | 81.8 cm (32.2 in) | 72.8 cm (28.7 in) |
| वजन | 695.0 g (24.52 oz) | 675.0 g (23.81 oz) |
| आहार | -- | -- |
| अंडों की संख्या | 1 | 2-3 |
| Population Trend | — | — |
Habitat Comparison
संरक्षण स्थिति
Least Concern
Swallow-tailed Gull
Least Concern
Black-tailed Gull
About These Birds
Swallow-tailed Gull
Swallow-tailed Gull, 55–60 cm, is the world's only fully nocturnal gull, breeding on the Galápagos Islands and roosting on the Humboldt Current. Distinctive red orbital ring, black-and-white head, deeply forked tail. Feeds at sea at night on squid and fish attracted to surface by bioluminescence.
Black-tailed Gull
Black-tailed Gull, 44–48 cm, is common on East Asian coasts from Russia to China, Japan, and Korea. Grey mantle, white body, yellow bill with red spot and black subterminal band, yellow legs. Omnivore; very vocal, known as the 'cat gull' for its mewing calls. Migratory; winters south to Vietnam.