The World Organization for Animal Health notes increasing detections in mammals in recent months, which warrants close monitoring.
The UK mammal H5N1 findings include foxes and otters, part of ongoing detections in mammal species alongside outbreaks in poultry and wild birds.
Commercial turkey farms in Iowa and Virginia were hit, affecting almost 40,000 birds.
US poultry losses have reached a record 58.16 million since the H5N1 outbreaks began in February 2022.
A mutation in the outbreak strain may have public health implications, given that it is present in the 2009 H1N1 pandemic flu virus.
Also, officials detail outbreaks in poultry globally, and 3 more grizzlies are infected in Montana.
Ecuador's health ministry reports the country's first human infection involving H5 avian influenza.
Infected mammals include skunks, grizzly bears, a raccoon, and a red fox.
The patient is from Hunan province's capital city, and the report didn't detail any poultry exposure.
The strain has caused mild infections in Europe and the United States.