- Clements, J. F., T. S. Schulenberg, M. J. Iliff, B.L. Sullivan, C. L. Wood, and D. Roberson. 2012. The eBird/Clements checklist of birds of the world: Version 6.7. Downloaded from http://www.birds.cornell.edu/clementschecklist/downloadable-clements-checklist
Habitat and Ecology
IUCN Red List Assessment
Red List Category
Red List Criteria
ACAP Annex 1. In 1985, 1,000 fledglings were banded (Croxall and Gales 1998), but only one has been recovered (G. A. Taylor in litt. 2000). In 1995/1996, a long-term population study was initiated on the Snares population (Taylor 2000). All islands are nature reserves, except for The Pyramid and The Forty-Fours, which are privately owned. In 1998, the Snares and Bounty Islands were declared part of a World Heritage Site. In 2006, the Western and Central Pacific Fisheries Commission (WCPFC) adopted a measure which will require all tuna and swordfish longline vessels to use at least two seabird bycatch mitigation measures when fishing south of 30 degrees South. Conservation Actions Proposed
Census all the Bounty Islands intensively for baseline population estimates. Census two islands in the Bounty and Snares Islands for two consecutive years at 10-year intervals. Obtain information from South African and South American observer programmes on bycatch levels. Further develop mitigation devices/techniques to minimise fisheries bycatch in trawl and pelagic longline fisheries. Remote tracking data is required for both breeding and non-breeding birds to further understand the level of interaction with longline and trawl fishing fleets (BirdLife International 2004).
Salvin's albatross, or Salvin's mollymawk, Thalassarche salvini, is a large seabird that ranges across the Southern Ocean. A medium sized mollymawk in the albatross family, it was long considered to be a subspecies of the shy albatross. It is a medium sized black and white albatross.
Mollymawks are a type of albatross that belong to the family Diomedeidae in the order Procellariiformes, along with shearwaters, fulmars, storm petrels, and diving petrels. They share certain identifying features. First, they have nasal passages that attach to the upper bill called naricorns. Although the nostrils on the albatross are on the sides of the bill, unlike other tubenosed seabirds. The bills of Procellariiformes are also unique in that they are split into between seven and nine horny plates. They produce a stomach oil made up of wax esters and triglycerides that is stored in the proventriculus. This is used against predators as well as an energy rich food source for chicks and for the adults during their long flights. Finally, they have a salt gland that is situated above the nasal passage and helps desalinate their bodies, due to the high amount of ocean water that they imbibe. It excretes a high saline solution from their nose.
The Salvin's albatross, white-capped albatross, shy albatross and Chatham albatross were all considered the same species until a 1998 book by Robertson and Nunn. Other experts followed suit, with BirdLife International in 2000, Brooke in 2004, ACAP in 2006, and SACC in 2008. Some, however, like James Clements (at the time of his death) didn't agree, nor has Cornell University since (which is responsible for his book). Molecular analysis has shown that it and the closely related Chatham albatross (also considered to be a subspecies of the shy albatross) are sister taxa, and more distantly related to the shy.
The Salvin's albatross is about 90 cm (35 in) and 2.56 m (8.4 ft) across the wings. It weighs 3.3–4.9 kg (7.3–10.8 lb) and is, alongside the shy albatross, the largest of the mollymawk or small albatross group. The adult bird has a silver-grey crown. Its face, upper throat, and upper mantle are grey, and its back, upperwing, and tail are grey-black. It has a white rump and underparts with a black thumbmark on underwing and black narrow leading and trailing edges on the wing and black wing tips. Its bill is pale grey-green with a pale yellow upper ridge, and a bright yellow tip on the upper mandible, and a dark spot on the tip of the lower mandible. The juveniles have more extensive grey areas and a blue-grey bill with black tips on both mandibles. It can be distinguished from the Chatham albatross by its larger size and grey bill, and from the shy albatross by the greyer head. Such differences can be difficult to pick out at sea, however, and this explains the under-representation of this species in at-sea surveys.
|Bounty Islands||30,750 pairs||1998||Possibly declining|
|Western Chain Islets, Snares Islands||< 650 pairs||1984|
|The Pyramid, Chatham Islands||2 pairs||2006|
|Île des Pingouins, Crozet Islands||1—4 pairs||2002|
It breeds mainly on small rocky islands with little vegetation, and the nest is a pedestal made of mud, feathers, and bird bones. A single egg is laid in September, and incubated by both parents until early November. The chicks fledge after about 4 months.
Range and habitat
The Salvin's albatross breed colonially on three disparate island groups in the Southern Ocean, Île des Pingouins in the Crozet Islands in the Indian Ocean and the Bounty Islands and The Snares to the south of New Zealand, The Pyramid, and Forty-Fours Island. At sea they range from South Africa across to Australia and as far east as the coast of South America. In April 2011, several photographs of a Salvin's or Chatham Island albatross were taken about 800 miles north of the Hawaiian Islands.
The IUCN classifies this species as vulnerable with longline fisheries and trawlers responsible for small amounts of deaths, although trawlers are responsible for more than half of those killed. The world population is currently estimated to be around 61,500 birds in 1998, which suggests a decline in the species since earlier studies (although differences in methods make direct comparisons difficult). There are 30,750 pairs, in 1998, on the Bounty Islands, compared to 76,000 pairs in 1978. There were 650 pairs on the Snares Islands, and 4 pairs were recorded on Île des Pingouins in the Crozet Islands. Single chicks have been observed on The Pyramid and Forty-fours Island in 2007.
Bird banding and studies are underway, and all of the islands except for The Pyramid, and Forty-fours Island, which are privately owned, are nature preserves. In 1998, the Snares Islands and Bounty Islands were declared World Heritage Sites, and in 2006, the Western and Central Pacific Fisheries Commission adopted a measure to require bird bycatch mitigation measures south of 30°S.
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- Miskelly, C. M.; Bester, A. J.; Bell, M. (2006). "Additions to the Chatham Islands’ bird list, with further records of vagrant and colonising bird species". Notornis (53): 215–230.
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- Remsen Jr., J. V.; et al. (February 2005). "Proposal (#166) to South American Classification Committee: Re-lump Thalassarche eremita and Thalassarche salvini with Thalassarche cauta". South American Classification Committee. American Ornithologists' Union. Retrieved 18 Feb 2009.
- Remsen Jr., J. V.; et al. (28 Feb 2008). "Proposal (#255) to South American Classification Committee : Follow-up to Proposal 155: Split Thalassarche cauta into three species". South American Classification Committee. American Ornithologists' Union. Retrieved 18 Feb 2009.
- Robertson, C. J. R.; Nunn, G. B. (1998). "Towards a new taxonomy for albatrosses". In Robertson, G.; Gales, R. Albatross biology and conservation. Chipping Norton, Australia: Surrey Beatty & Sons. pp. 13–19.
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