Dead birds suspected to have died from Highly Pathogenic Avian Influenza have been found on Kigigak Island and Tutakoke River in Alaska, with other bird species displaying unusual behaviors.

Brazil is investigating another four new potential cases of highly pathogenic avian influenza (H5N1) in wild birds, according to authorities from the state of Espirito Santo, where Brazil's first ever cases were confirmed this week.

Highly pathogenic avian influenza (HPAI) A(H5N1) is a strain of the avian influenza virus that primarily affects birds, particularly poultry. It has been detected in farmed mink.

The new cases bring the total count to three cases of Avian flu in the territory. The two ravens were found dead just a few days apart, on Oct. 26 and Oct. 28.

As of June 16, 48 cases of highly pathogenic avian flu were detected across the state of Alaska, according to the Department of Environmental Conservation. None of these confirmed cases of highly pathogenic avian influenza are in the northernmost regions of Alaska.