February 27, 2024


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Decline of the Pirate of the Seas: Great Skua Population Dwindles Due to Avian Flu, Reveals RSPB Report

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The Decline of the Pirate of the Seas: Avian Flu Takes a Heavy Toll on Great Skua Population

The Royal Society for the Protection of Birds (RSPB) recently released a report indicating a drastic decline in the population of great skuas, often referred to as the “pirates of the seas,” due to the devastating effects of avian flu. These powerful birds, known for their thieving behaviors around the UK’s coasts, have seen their numbers plummet by 76% in 2023, marking a significant decline from previous years.

Avian Flu’s Impact on Sea-Bird Populations

The RSPB report highlights how the H5N1 strain of avian flu has inflicted substantial harm on various bird species, including great skuas, gannets, and roseate terns. The outbreak, which occurred between 2021 and 2022, resulted in the mass mortality of thousands of wild birds, disrupting the upward trajectory of these species’ populations.

The survey conducted by the RSPB in 2023 revealed alarming statistics, indicating a 25% decrease in gannet populations, a 21% reduction in roseate terns, a 35% decline in sandwich terns, and a 42% downturn in common terns compared to the census data from 2015-2021.

Immediate Conservation Threats Faced by Sea-Birds

According to Jean Duggan, the RSPB’s avian influenza policy assistant, the findings serve as a wake-up call to the severity of avian flu as one of the most pressing conservation threats impacting multiple sea-bird species. Avian flu has not only led to a significant decrease in sea-bird populations but has also exacerbated the existing challenges faced by these species.

Long-Term Implications and Additional Threats

While avian flu has shown signs of becoming less acute in the UK in recent months, the RSPB emphasizes the need to consider it a long-term threat, especially as the virus continues to evolve and pose risks to bird populations globally. In addition to avian flu, sea-birds in the UK also confront threats linked to climate change, fishing-related mortality, offshore wind developments, and food scarcity, all of which contribute to the overall decline in their populations.

Key Points:

– Great skuas, gannets, and roseate terns have experienced a substantial decline in their populations due to avian flu.
– The H5N1 strain of avian flu caused mass mortalities of wild birds in 2021-2022, disrupting the positive population trend observed in previous years.
– The RSPB’s report underscores the immediate and long-term conservation threats posed to multiple sea-bird species by avian flu and other environmental challenges.

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