Avian Flu Devastates Wildlife Near Antarctica
A severe strain of bird flu affecting remote islands close to Antarctica has significantly impacted local wildlife. Researchers estimate that around 13,000 seal pups, along with numerous penguins and seabirds, have died due to this outbreak.
Drone surveys carried out by the Australian Antarctic Program during October and January uncovered distressing scenes of seal pup carcasses scattered along the ash-colored shores of Heard and McDonald Islands. Jarrod Hodgson, a senior research scientist, described the findings as “sobering.”
Heard and McDonald Islands, situated roughly 2,485 miles (4,000 kilometers) from mainland Australia, have historically served as a secluded haven for breeding birds and marine mammals.
According to the program, an alarming 76% of the 17,000 seal pups born on the islands did not survive, with one specific area reporting a staggering death rate of 97%.
“We are still uncertain about the effects on the breeding adult population of southern elephant seals,” Hodgson commented.
Additional data collected in January also indicated that several hundred adult king penguins on Heard Island have perished, with mortality rates recorded as unusually high.
Wildlife biologist Julie McInnes noted, “This is the first detection of H5 bird flu in an Australian external territory, marking the ongoing eastward spread of the virus in the sub-Antarctic.” She also pointed out that the patterns observed align with other sub-Antarctic islands like South Georgia, where elephant seals have been severely affected.
As of February, neither the Australian mainland nor New Zealand had reported any cases of the H5N1 strain, which has been spreading among birds globally and has even impacted some mammals.
An analysis of genetic data suggests that the H5 bird flu strain likely reached the islands from the Crozet Islands, located approximately 1,800 kilometers away, possibly around August of the previous year.
The results of this research have been documented in the scientific journal BioRxiv, although they have yet to undergo peer review.
