Orr Roeg gull

Orr Roeg gull
Orr Roeg gull Larus atlanticus
Maintenance situation evaluation
VULNERABLE (IUCN Red List Ver.3.1 (2001))
Classification
界 : Animal kingdom Animalia The gate : Chordate gate Chordata Amon : Vertebrate Amon Vertebrata Rope : Bird rope Aves Eyes : Plover eyes Charadriiformes Suborder : Gull suborder Lari Course : Gull department Laridae The genus : Gull genus Larus Kind : Orr Roeg gull L. atlanticus
Scientific name
Larus atlanticus Olrog, 1958
Japanese name
Orr Roeg gull
Fame
Band-tailed gull Olrog's gull Simeon's gull

The birds that the Orr Roeg gulls (Larus atlanticus) are classified in the plover eyes gull department gull genus.

Table of contents

Distribution

Specific epithet atlanticus is will of "one of the Atlantic".

Argentina、UruguayThe southeastern part

It spreads only in Argentine Atlantic coast.

Form

50-56cm in total length. Wing expanse 130-140cm. 0.9-1 kg in weight. The body is covered with a white feather. The wing is covered with the feather of the gunmetal. The tail feather is white, and a black lateral stripe enters.

A color of the bills is yellow, and a spot of the rouge et noir enters the tip. The iris is dark brown. A color of the hind leg is yellow.

A whole body is a brown feather, and the young bird is covered, and a rain-cover and a flight feather are bordered faintly. The breeding feather is covered with the feather that the head is white. The head is a brown feather, and the non-breeding feather is covered, and a crescent moon-formed white spot enters the lower eyes.

Habits

The eating habit eats Crustacea (crab) and shellfish (hard-shelled mussel) in animal food mainly, but eats fish, the corpse of the animal. I snatch game on the surface of the water and make nose dive and, in search of game, prey on game while flying in shore and reed Hara.

The breeding form is oviparous. I form a rookery (colony). I make various nests which spread grass, and piled up grass to become hollow in the shore and the delta and lay 2-3 eggs in once.

with the human being of relationships

I may hunt for the leftover food in dump sites.

The number of the habitation decreases by the destruction of the habitat by the development, the poaching of the egg as the food. The number of the habitation in 1992 is estimated to be 1,100-1,300 pair.

Allied item

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• The gull genus

References

• Hideo Ohara, Masanori Uramoto, Hidetoshi Ota, Masafumi Matsui compilation "red data animals 3 central South America," it is 192-193 pages for Kodansha, 2,001 years.

Outside link

• IUCN 2008 Red List - Home Page -
  • BirdLife International 2008. Larus atlanticus. In: IUCN 2008. 2008 IUCN Red List of Threatened Species.

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