|
|
| Line 1: |
Line 1: |
| − |
| |
| | ;Larus atlanticus | | ;Larus atlanticus |
| | [[Image:Olrogs_Gull.jpg|thumb|550px|right|Photo by Fritz73]] | | [[Image:Olrogs_Gull.jpg|thumb|550px|right|Photo by Fritz73]] |
| | ==Identification== | | ==Identification== |
| − | This large gull has a white head, neck, rump and underside, with black wings and a black band on the tail. The legs and bill are yellow, and the bill has a black band near the end, with a red tip. Outside the breeding season, the gull's colouration becomes mottled on the head. Juveniles are brown and also have mottled heads. They have a dark tail and a black tip to their bills, rather than the mature red tip. This species has nasal and rasping calls.
| + | 50-56 cm. White head, neck, rump and underside, black wings, black band on tail, yellow legs, yellow bill with a black band near the end, and red tip. |
| − | 50-56 cm. Large, black-and-white gull. White head, neck, rump and underparts. Rest of upperparts black. Black wings with white trailing edge. White tail with broad, black subterminal band. Yellowish legs. Yellow bill with black subterminal band and red tip. Head mottled during non-breeding season. Juvenile mostly brown with dark mottling around head, dark tail and black bill tip. Similar spp. Kelp Gull L. dominicanus is slightly larger with wholly white tail, no subterminal band on bill and white tips to primaries. Voice Nasal and guttural calls.
| + | |
| | ==Distribution== | | ==Distribution== |
| − | Larus atlanticus breeds on the coast of Argentina between 39°12' and 45°11'S6. There are eight colonies in the Bahía Blanca estuary and Bahía Anegada, south Buenos Aires, and Bahía Melo and Caleta Malaspina, north of Golfo San Jorge, Chubut. The Bahía Blanca estuary holds a very high proportion of the breeding population. In winter, the species disperses north, reaching Uruguay and Brazil, with late breeding season records south to Santa Cruz and Tierra del Fuego and one inland in Córdoba.
| + | [[Argentina]] |
| | + | |
| | ==Taxonomy== | | ==Taxonomy== |
| | ==Habitat== | | ==Habitat== |
| − | It breeds on flat, sandy islands just above the water-level, and frequents beaches, rocky coasts, harbours, coastal and brackish lagoons and estuaries.
| + | Flat, sandy islands, beaches, rocky coasts, harbours, coastal and brackish lagoons and estuaries. |
| | ==Behaviour== | | ==Behaviour== |
| − | Eggs are laid in September-October and chicks fledge in November. The diet is thought to consist mainly of crabs in the breeding season, but it has generalist feeding habits (at least) in the non-breeding season. | + | Eggs are laid in September-October and chicks fledge in November. |
| | + | |
| | + | The diet includes mainly of crabs in the breeding season. |
| | + | |
| | ==External Links== | | ==External Links== |
| | | | |
| − | [[Category:Birds]] | + | [[Category:Birds]][[category:incomplete]] |
- Larus atlanticus
Identification
50-56 cm. White head, neck, rump and underside, black wings, black band on tail, yellow legs, yellow bill with a black band near the end, and red tip.
Distribution
Argentina
Taxonomy
Habitat
Flat, sandy islands, beaches, rocky coasts, harbours, coastal and brackish lagoons and estuaries.
Behaviour
Eggs are laid in September-October and chicks fledge in November.
The diet includes mainly of crabs in the breeding season.
External Links
