Odd Sørensen discovered this dead whooper swan on 10 April. The Norwegian Food Safety Authority has received daily reports of dead birds and are asking the public to help report bird mortality in particular with ducks, geese, swans, seagulls, eagles, buzzards, crowd and ravens.

The H5N8 virus was detected in sick and injured birds in February and early March this year, including in a swan found dead in Helsinki's Eläintarhanlahti park and a goshawk sent to Korkeasaari Wildlife Hospital from Kumpula. Several birds infected with avian influenza have been found in Uusimaa this winter.

The particularly dangerous strain of avian influenza virus H5N8 has been detected in a mute swan found on the Kopli peninsula in Tallinn.