Belgium ordered its poultry into lockdown from Monday after detecting a case of bird flu in a wild duck, extending avian quarantine measures already in place in neighbouring countries.
Authorities are attempting to prevent farm birds coming into contact with wild migratory ones to prevent the H5N1 virus from spreading.
The sickened wild duck was found in Schilde, a town on the eastern outskirts of Antwerp, Belgium's second-biggest urban agglomeration.
Neighbouring France and the Netherlands have imposed similar poultry lockdowns over the past three weeks following outbreaks on their territories.