Diomedea epomophora 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Aves Procellariiformes Diomedeidae

Scientific Name: Diomedea epomophora Lesson, 1825
Common Name(s):
English Southern Royal Albatross, Royal Albatross
Taxonomic Source(s): Robertson, C. J. R.; Nunn, G. B. 1998. Towards a new taxonomy for albatrosses. In: Robertson, G.; Gales, R. (ed.), Albatross biology and conservation, pp. 13-19. Surrey Beatty & Sons, Chipping Norton, Australia.
Identification information: 115 cm.  Huge, white-and-black albatross.  Juvenile, white head, neck, upper mantle, rump and underparts.  White mantle flecked black.  Dark black-brown upperwing with white flecks on coverts and white leading edge.  White tail, tipped black-brown.  White underwing with black tip.  With maturity, back and tail become white.  Starting at leading edge near shoulder, upperwing-coverts become increasingly white.  All ages, light pink bill (darker pink when chick-rearing) with black cutting edge on upper mandible.  Legs flesh. Similar spp.  Adult males are the whitest albatrosses.  Northern Royal Albatross D. sanfordi has different underwing pattern, no white on upperwing, and dark leading edge (C. J. R. Robertson in litt. 2008).

Assessment Information [top]

Red List Category & Criteria: Vulnerable D2 ver 3.1
Year Published: 2017
Date Assessed: 2016-10-01
Assessor(s): BirdLife International
Reviewer(s): Butchart, S. & Symes, A.
Contributor(s): Baker, B., Moore, P., Robertson, C., Stahl, J.-C., Taylor, G.A. & Walker, K.
Facilitator/Compiler(s): Anderson, O., Butchart, S., Calvert, R., Moreno, R., Small, C., Sullivan, B., Symes, A., Martin, R
Although current population trends are assumed to be stable, this species qualifies as Vulnerable because it has a very small range, breeding on four islands though largely confined to just one, with a fifth mainland population comprising only hybrid birds.  It is therefore highly susceptible to stochastic effects and human impacts.

Previously published Red List assessments:

Geographic Range [top]

Range Description:Diomedea epomophora breeds on Campbell Island (99% of the total population), on Adams, Enderby and Auckland Islands (Auckland Islands group), and on Taiaroa Head (Otago Peninsula, South Island), New Zealand.  The Campbell population was estimated at 7,800 breeding pairs in 2004-2008 (ACAP 2009).  69 pairs were present on Enderby in 2001 (Childerhouse et al. 2003), and 54 and 63 nesting pairs were estimated from aerial surveys in 2013 and 2014, respectively (Baker and Jensz 2013, Baker et al. 2014).  Although c.20 pairs have previously been reported to breed on Auckland and Adams Islands combined (Croxall and Gales 1998), aerial surveys during the last 10 years appear to confirm that there are presently no breeding pairs on Auckland Island (B. Baker pers. comm. 2016).  No pure-bred D. epomophora are present at Taiaroa Head (Heather and Robertson 1997, Taylor 2000).  The species circumnavigates the Southern Ocean after breeding (Croxall and Gales 1998), but is most commonly recorded in New Zealand and South American waters (Marchant and Higgins 1990).  Breeding adults forage from the South Island southwards to the Campbell Plateau (Waugh et al. 2002) and north to the Chatham Rise.  Non-breeding birds forage on the west and east coast of South America (Moore and Bettany 2005), generally between 30-55°S (ACAP 2009).  Whole island censuses on Campbell Island in 1994-1995 and study plot censuses in 1996-1997 indicate that the population is likely to be stable, or possibly increasing (Moore et al. 1997).

Countries occurrence:
Argentina; Australia; Brazil; Chile; Falkland Islands (Malvinas); French Southern Territories; Heard Island and McDonald Islands; New Zealand; Saint Helena, Ascension and Tristan da Cunha; South Africa; South Georgia and the South Sandwich Islands; Uruguay
Antarctica; New Caledonia
Present - origin uncertain:
Bouvet Island
Additional data:
Estimated area of occupancy (AOO) - km2:750Continuing decline in area of occupancy (AOO):Unknown
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:98600000
Continuing decline in extent of occurrence (EOO):UnknownExtreme fluctuations in extent of occurrence (EOO):No
Number of Locations:2Continuing decline in number of locations:Unknown
Extreme fluctuations in the number of locations:No
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:The Campbell population is estimated at 7,800 breeding pairs between 2004-2008 (ACAP 2009).  69 pairs were present on Enderby in 2001 (Childerhouse et al. 2003), and 54 and 63 nesting pairs were estimated in aerial survey in 2013 and 2014, respectively (Baker and Jensz 2013, Baker et al. 2014).  Although c.20 pairs breed on Auckland and Adams Islands combined (Croxall and Gales 1998), aerial survey during the last 10 years seems to confirm that Southern Royal is not currently breeding in Auckland Island (B. Baker pers. comm. 2016).  An estimate of c7,900 annual breeding pairs is equivalent to c.27,200 mature individuals, based on the ratio used by Croxall and Gales (1998).

Trend Justification:  Whole island censuses on Campbell Island in 1994-1995 and study plot censuses in 1996-1997 indicate that the population is likely to be stable, or possibly increasing (Moore et al. 1997).

Current Population Trend:Stable
Additional data:
Number of mature individuals:27200Continuing decline of mature individuals:Unknown
Extreme fluctuations:NoPopulation severely fragmented:No
No. of subpopulations:2Continuing decline in subpopulations:Unknown
Extreme fluctuations in subpopulations:NoAll individuals in one subpopulation:No

Habitat and Ecology [top]

Habitat and Ecology:Behaviour  Breeding is biennial if a chick is successfully reared.  Birds return to colonies in October and eggs are laid from late November to late December. Chicks hatch from early February to early March, and fledge in early October to early December.  Age of first return to colonies is at least 5 years and the age of first breeding is thought to be around 6-12 years old (ACAP 2009). Habitat  Breeding  It nests on tussock grassland slopes, ridges, and plateaus (Marchant and Higgins 1990, Heather and Robertson 1997).  Diet  It feeds primarily on squid and fish, supplemented by salps, crustacea and carrion (Imber 1999).  Foraging range  During incubation, breeding birds from Campbell Island foraged mostly within 1,250 km of the colonies over shallow (<1500 m deep) shelf and shelf break waters of the Campbell Plateau north to southern New Zealand and over the Chatham Rise, commuting directly to locally productive sites (ACAP 2009).

Systems:Terrestrial; Marine
Continuing decline in area, extent and/or quality of habitat:Unknown
Generation Length (years):42.3
Movement patterns:Full Migrant
Congregatory:Congregatory (and dispersive)

Threats [top]

Major Threat(s):

The population is thought to be recovering after human predation, farming and introduced mammals caused reductions in all populations until the 1930s, extirpating the Enderby and Auckland Islands populations by the late 1800s (Heather and Robertson 1997).  Pigs and cats may have caused extinction on Auckland Island, where no birds have been recorded since 2007 (B.Baker unpubl. data).  On Campbell and Enderby Dracophyllum scrub is spreading, possibly due to climatic warming, and may reduce breeding habitat, although on Enderby the population would appear to have been stable for the last 20 years.  A possible decrease in the population during the 1970s - early 1980s coincided with the peak in long-line fishing in the New Zealand region (Moore and Bettany 2005).  Southern Royal Albatross are caught by longliners and trawlers in Pacific, Indian and Atlantic Oceans, and off the east and west coasts of South America (Taylor 2000, Moore and Bettany 2005, ACAP 2009).  Although reported bycatch numbers of D. epomophora in New Zealand fisheries have been relatively low, with 14 individuals observed killed in surface longlines and trawls between 1998 and 2004, observer coverage in this period was less than 5% of total fishing effort.  Similarly, mortalities observed in the Argentine longline fleet along the Patagonian Shelf between 1999 and 2001 comprised on average 1.4% (0-6.1%) of the 901 seabirds caught in total. 

Conservation Actions [top]

Conservation Actions: Conservation Actions Underway
CMS Appendix II and ACAP Annex 1.  Cattle and sheep have been removed from Campbell, and cattle, rabbits and mice have been eradicated from Enderby.  Rats were eradicated from Campbell in 2001, and an expedition in 1993 found no evidence of them persisting (P. Moore in litt. 2003).  Almost 36,000 birds have been banded on Campbell since the 1940s, but since 2006 bands are being removed, except in two study colonies.  Two study areas on Campbell were monitored annually in the 1990s (P. Moore in litt. 2003).  All islands are nature reserves and, in 1998, were declared a World Heritage Site.

Conservation Actions Proposed
Census the Campbell at 10-year intervals.  Monitor vegetation change on Campbell and Enderby and assess its effect on habitat availability.  Eradicate pigs and cats from Auckland Island (Taylor 2000).

Amended [top]

Amended reason: Map revised. Edited: Geographic Range, and Threats text fields. The estimated number of mature individual for one of the colonies were altered, and the estimate for number of individuals in the largest subpopulation. Added references and also added a new Facilitator and a new Contributor.

Citation: BirdLife International. 2017. Diomedea epomophora (amended version of 2016 assessment). The IUCN Red List of Threatened Species 2017: e.T22698314A110677782. . Downloaded on 20 September 2018.
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