Avian influenza has affected tens of millions of birds and thousands of mammals worldwide in recent years.
Researchers found about 35 penguins dead in the Falkland Islands on Jan. 19.
Since 2021, Europe and the Americas have been suffering from a nearly continuous outbreak of H5N1 avian influenza.
It's likely the polar bear was infected after scavenging dead birds, according to local officials.
In October, the first ever recorded case of bird flu in the Antarctic region was detected in brown skua birds.
Last week, two outbreaks of H5N1 avian influenza were reported in Israel.
The outbreak is the second reported in the past month and the fifth reported in Israel this season.
A new case of H5N1 avian influenza was recently found in the central Israeli city of Yehud • "Within living memory, no avian influenza has affected wild birds in the same capacity"
Scientists have expressed concerns that the outbreak could spread to Antarctica and devastate penguin and seal populations.
All poultry coops in a 10 kilometer radius have been locked down to prevent the spread of the virus.