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A photo of a Tristan Albatross (Diomedea dabbenena)
Tristan Albatross

Tristan Albatross

Diomedea dabbenena

The Tristan albatross, Diomedea dabbenena, is a majestic seabird, a member of the Diomedeidae family. Recognized as a distinct species in 1998, it is one of the great albatrosses within the genus Diomedea. This bird is slightly smaller than its close relative, the snowy albatross, with a wingspan reaching up to 3.05 meters and a body length of about 110 centimeters. It retains a somewhat darker back throughout its life and never achieves the snowy albatross's full white plumage.

Identification Tips

When observing the Tristan albatross, note its sizeable wingspan and the slightly darker plumage on its back compared to the snowy albatross. The bill of the Tristan albatross is approximately 25 mm shorter than that of its snowy counterpart. At sea, these birds can be challenging to distinguish from one another, so attention to these subtle differences is key.

Habitat

The Tristan albatross is an oceanic bird, spending much of its life at sea. It is endemic to the remote islands of the Tristan da Cunha group, with the majority of the population nesting on Gough Island.

Distribution

While at sea, the distribution of the Tristan albatross is not fully known due to their similarity to the snowy albatross. However, satellite tracking has revealed that they forage widely in the South Atlantic. Males tend to forage west towards South America, while females forage east towards Africa. Sightings have been reported near Brazil and off the coast of Australia.

Behaviour

The Tristan albatross is a biennial breeder, nesting in wet heath at elevations between 400 and 700 meters. They are monogamous creatures, often not breeding until around the age of 10. Their diet consists primarily of fish and cephalopods.

Conservation status

The Tristan albatross is currently listed as Critically Endangered. Threats include long-line fishing and predation by invasive mice on Gough Island, which have been known to kill albatross chicks. The population on Gough has seen a significant decline, with a decrease of 28% over 46 years. Conservation measures are critical for the survival of this species.

Diet and Feeding

These albatrosses feed on fish and cephalopods, sourcing their food from the vast oceanic waters they inhabit.

Breeding

Tristan albatrosses breed every other year, with a preference for nesting in wet heathland at higher elevations on their native islands. They form monogamous pairs and have a delayed onset of breeding, typically starting around 10 years of age.

Similar Species

The most similar species to the Tristan albatross is the snowy albatross. They can be differentiated by the Tristan's slightly darker back, smaller size, and shorter bill.

In conclusion, the Tristan albatross is a remarkable bird, facing significant challenges for survival. Observers are encouraged to cherish any sightings of this critically endangered species, and to support conservation efforts aimed at securing its future.

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Tristan Albatrosses on Birda

Sightings
A map showing the sighting location
Profile picture for Abdul-Ghakeem Abrahams
Abdul-Ghakeem Abrahams
15 Mar 2024 - 3:48pm
South Africa

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