Bird Flu Ravages Antarctic Wildlife, Raising Extinction Concerns

A highly dangerous strain of avian influenza is spreading rapidly across Antarctica, threatening vulnerable wildlife populations, according to Chilean researcher Victor Neira. The virus, first detected in skuas in April 2024, has now been found in multiple species along 900 kilometers of the Antarctic coastline.

Highly Pathogenic Strain Detected

The particularly virulent strain of bird flu was initially identified by Victor Neira and his team in five skuas, a type of polar seabird. This discovery was published in the journal Frontiers in Veterinary Science. Neira, a scientist at the University of Chile and the Chilean Antarctic Institute (INACH), warns that the disease is “capable of killing 100 percent of birds in short periods of time.”

Spread to Multiple Species

Since its initial detection, the virus has spread to Antarctic cormorants, kelp gulls, Adelie and gentoo penguins, and Antarctic fur seals. Neira stated, “The virus has completely spread throughout the Antarctic region where we have the capacity to go and study.” The speed of transmission is alarming, with the potential to kill 90 to 100 percent of animals in a given area within one or two days.

Vulnerable Populations at Risk

Antarctic species are particularly vulnerable due to their generally small population sizes. For example, populations of Antarctic cormorants and skuas are estimated at only around 20,000 individuals. While currently listed as species of “least concern” by the International Union for Conservation of Nature (IUCN), Neira emphasizes that any significant impact from the virus could push these species towards extinction.

Global Bird Flu Wave

This outbreak is part of a larger global wave of avian flu that has affected birds and mammals across America, Asia, and Europe since 2021, driven by bird migration patterns. In 2023, approximately 1,300 Humboldt penguins – nearly 10% of the Chilean population – died from the flu, according to the National Fisheries Service (Sernapesca).

Confirmation of H5N1 Strain

The Centers for Disease Control and Prevention (CDC) confirmed the presence of highly pathogenic avian influenza H5N1 in skuas in Antarctica in 2024. CDC Report

Key Takeaways

• A highly lethal strain of bird flu is spreading rapidly across Antarctica.
• The virus has been detected in skuas, cormorants, gulls, penguins, and fur seals.
• Antarctic species are particularly vulnerable due to small population sizes.
• This outbreak is part of a global wave of avian influenza affecting multiple continents.