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(Redirected from Thalassarche chlororhynchos chlororhynchos)
Alternative name: Yellow-nosed Mollymawk
Length 71-82 cm (28-32Â¼ in). Wingspan 180-210 cm.
The smallest southern albatross but similar to other mollymawks.
Adult: back blackish-grey, upperwings blackish, rump white, tail dark grey and underparts white. Head grey with white nape and hindneck. Under-wing white with black tip and clear-cut margins, broadest on leading edge. Iris brown, bill black with yellow culminicorn and pinkish tip, legs bluish-pink.
Immature: as adult but head whiter and bill all-dark.
T. c. chlororhynchos: the yellow bill stripe ends in a curve at the forehead, but is pointed in T. c. bassi. Also the Atlantic bird shows a greyish wash around the neck while the Indian one is pure white.
 Similar Species
South Atlantic and southern Indian Oceans. Breeds on Tristan da Cunha and Gough (St. Helena), St Paul, Amsterdam, Prince Edward and Crozet Islands. After breeding disperses to South Atlantic and Indian Oceans between 15 and 45 degrees south. The commonest albatross off eastern South Africa in May-September and off southern Western Australia in May-October where occurs north to Point Cloates.
 Diomedea vs. Thalassarche
Genera Phoebastria and Thalassarche formerly placed in the Diomedea, but now considered by virtually all authorities (Clements, Howard & Moore, AOU, BOU, SACC) to be separate genera in light of Nunn et al. (1996)  and Penhallurick & Wink (2004) .
Two subspecies recognised:
T.c. bassi is sometimes separated as a separate species, Indian Yellow-nosed Albatross, by some authorities. There is an ongoing discussion whether bassi or carteri is the correct scientific name for this form.
Colonial breeder on cliffs of remote islands and present from August until May, otherwise at sea. Sometimes follows ships.
Breeds in southern summer with egg-laying starting in mid-September. Nest is a large bowl made of mud and vegetable matter. Single egg, white marked with brown at larger end (96 x 62mm). Incubated by both parents for about 55-60 days and young fed by both parents. Fledges after 5 months.
Squid and fish, sometimes refuse from ships.
Bleating calls and bill-clapping in display, coughing and grunting sounds when competing for food at sea.
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