Calonectris sp. shearwater with abnormal plumage, off Calheta, Madeira, Portugal, 14 November 2023, photograph by Pedro Nascimento (from the publication)

Pedro Nascimento (On Tales – Unipessoal, Limitada, Funchal, Portugal) and colleagues have published in the open-access journal Marine Ornithology on photographing a shearwater Calonectris sp. with abnormal plumage.

The paper’s abstract follows:

“Herein, we report a with aberrant plumage, observed southwest off Madeira Island.  The bird had an unusual amount of white feathering, more than has been reported so far for the genus.  Both upperparts and underparts were predominantly white. Initially, we thought the bird was a leucistic Cory's Shearwater C. borealis, but some characteristics could not be ascertained.  Records of such aberrations should be published to provide a more comprehensive understanding of the subject.”

Reference:

Nascimento, P., Santos, E., Gonçalves, J. & Teixeira, M. 2025.  First aberrant coloured Calonectris shearwater recorded in Madeira, Portugal.  Marine Ornithology 53: 115–117.

John Cooper, Emeritus Information Officer, Agreement on the Conservation of Albatrosses and Petrels, 19 March 2025

“Good Friends”.  Displaying Wandering Albatrosses, watercolour by Flávia F. Barreto; after a photograph by Alexis Osborne

For the three months of November 2024 to January 2025 Saving Marion Island’s Seabirds. The Mouse-Free Marion Project collaborated with the collective Artists & Biologists Unite for Nature (ABUN) in a special project entitled “Conservation Campaign for Marion Island”.  ABUN artists were invited to create and submit artworks that the Mouse-Free Marion Project may use to create awareness and for fund raising.  Their chosen subjects were inspired by photographs of Marion Island’s biota, notably its ACAP-listed albatrosses and petrels that are threatened by the island’s introduced House Mice.   A total of 43 artworks was submitted, all viewable here.  A selected portfolio follows.

Grey Petrel and chick, gouache by Andrea Siemt, after a photograph by Ben Dilley

Sooty Albatrosses by Joyce Hartmann, after a photograph by Danielle Keys and Stefan Schoombie

White-chinned Petrel, digital art by Peter Shearer, after a photograph by Ben Dilley

Grey-headed Albatross by Lois Davis, after a photograph by Kim Stevens

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“Party time - no rodents invited”. Polychrome pencils, by Di Roberts

With thanks to the Mouse-Free Marion Project and Artists & Biologists Unite for Nature.

John Cooper, Emeritus Information Officer, Agreement on the Conservation of Albatrosses and Petrels, 18 March 2025

“Wandering Albatrosses courting” by Maureen Rousseau of Artist & Biologists Unite for Nature (ABUN) for World Albatross Day 19 June 2020, after a photograph by Michelle Risi

Augustin Clessin (Centre d’Ecologie Fonctionnelle et Evolutive, Université Montpellier, France) and colleagues have pre-published in bioRxiv preprint on records of highly pathogenic avian influenza detected in the French sub-Antarctic islands of Possession, Crozets and Kerguelen, including in  Vulnerable Wandering Albatross Diomedea exulans chicks.  The paper follows on from an earlier reports of HPAI on sub-Antarctic islands in ACAP Latest News.

The paper’s abstract follows:

“Since 2020, the outbreak of highly pathogenic avian influenza (HPAI) virus l; clade 2.3.4.4b has turned into the largest documented panzootic to date, reaching the sub-Antarctic region and Antarctica via the tip of South America in 2023.  Here, we describe its recent arrival into the Indian Ocean sub-Antarctic archipelagos of Crozet and Kerguelen, where we first detected the virus in October 2024 in dead southern elephant seals, king penguins, gentoo penguins, brown skuas and kelp gulls.  While the panzootic is ongoing, it has already caused unprecedented and alarming mortalities of southern elephant seals.  We collected brain swabs from various seal and bird carcasses, subsequently isolated the virus and obtained 25 novel HPAI H5N1 clade 2.3.4.4b sequences.  Our phylogenetic and phylogeographic analyses show that there have been independent introductions of the virus to Crozet and Kerguelen, from the distant South Georgia Islands in the Southern Atlantic, and not from the more nearby coasts of South Africa.  Our results point to a year-long gap in genomic surveillance in the south polar region, obscuring how HPAI H5N1 clade 2.3.4.4b is spreading in the sub-Antarctic and illustrating the difficulties in tracking pathogen dispersal in the region.  Locally, our phylogenetic analyses show that the virus is transmitted between different species.   Moreover, our serological analyses show that some southern elephant seal pups had mounted an anti-H5 antibody response. With the spread to Crozet and Kerguelen, HPAI H5N1 2.3.4.4b is moving ever closer to Australia and New Zealand, which currently remain free from infections with this strain, and represents a major threat to the sub-Antarctic wildlife.  Our results provide key elements to enable stakeholders to anticipate the arrival and spread of the virus in remote areas of critical wildlife conservation concerns.”

Read a popular account of HPAI in Antarctica and on sub-Antarctic islands here.

ACAP has chosen “Effects of Disease” as its theme for this year’s World Albatross Day on 19 June.

Reference:

Clessin, A., Briand, F.-X., Tornos, J., Lejeune, M., De Pasquale, C., Fischer, R., Souchaud, F., Hirchaud, E., Bralet T., Guinet, C., McMahon, C.R., Grasland, B., Baele, G. & Boulinier, T. 2025.  Mass mortality events in the sub-Antarctic Indian Ocean caused by long-distance circumpolar spread of highly pathogenic avian influenza H5N1 clade 2.3.4.4b.  bioRxiv preprint.

John Cooper, Emeritus Information Officer, Agreement on the Conservation of Albatrosses and Petrels, 17 March 2025

 Amsterdam Island with the French surveillance frigate, Floréal, photograph by the Marine nationale

ACAP Latest News has previously reported on the January wildfire that caused the evacuation of the personnel manning France’s Amsterdam Island in the southern Indian Ocean, and the plan to send an inspection team in late February.  With the help of Google Translate, information is now available on what the inspection found in relation to the island’s seabirds, as summarized below.

• The fire is still burning in more than 20 “hotspots”, with nearly 55% of the island now burnt and most of the island's Phylica arborea woodland affected.
• An expert assessment carried out at the Pointe Bénédicte site, where the first flames were observed, has not yet determined the cause of the fire.
• The Entrecasteaux cliffs, a breeding locality for the Endangered Indian Yellow-nosed Albatrosses Thalassarche carteri and Endangered Northern Rockhopper Penguins Eudyptes moseleyi, have as yet not been burnt.
• Only one nest of the endemic and Endangered Amsterdam Albatross Diomedea amsterdamensis was located within the fire's reach. “The laying period for the next [2025/26] breeding season is underway. If the fire stops its spread and does not further impact the breeding area, the impact on the Amsterdam Albatross should remain low” (in translation).

 Smoking hotspots on Amsterdam Island, with the Martin-de-Viviès base in the background, photograph by TAAF-SDIS

A further inspection and necessary repairs to the Martin-de-Viviès base are planned to take place in April.  A decision will then be made as to iwhen the island is to be reoccupied.

With thanks to Maëlle Connan.

John Cooper, Emeritus Information Officer, Agreement on the Conservation of Albatrosses and Petrels, 14 March 2025