The "highly pathogenic" H5N8 virus first emerged on the French island of Corsica in November and infected the mainland in December, Agence France-Presse reports. With over 124 outbreaks reported to date, the Ministry of Agriculture said about 350,000 ducks have been culled since Christmas Eve. Now, about 400,000 more birds are set to be slaughtered.
Loic Evain, the government's chief veterinary officer, called the strain "very, very contagious." It cannot harm humans.
In a Friday interview, Agriculture Minister Julien Denormandie called the culling a "race against time," Reuters reports. Foie gras producers fear that history will repeat itself, following the destructive bird flu waves in 2016 and 2017, in which millions of birds were slaughtered.
Now, culling will be expanded from a 1.8 mile (3 km) to a 3.1 mile (5 km) zone around any outbreak, the agriculture ministry said.
According to the AFP, bird flu outbreaks have also been reported this winter in Belgium, the Netherlands, Sweden, Britain and Ireland.