Wild Animals - birdflustocks.com

Birds

Millions of birds have spread H5N1 all over the globe. While some species of waterfowl are mostly immune and function as a reservoir, migrating birds spread the disease, and some species may go extinct because of H5N1.

>> Birds

It is hard to describe. When you’re watching a nest or tracking a nest, you realise each bird has its own personality, it is an individual with a life. Dare I say, a soul. It has its own agency. So when you see that bird that you’ve followed, struggling for life or dead, it’s horrendous. There’s nothing you can do to help, you know it’s not going to recover and they don’t die quickly.

Source: I helped pick up 6,000 dead birds last summer. This is what I learned about the horrors of bird flu

We estimate the scale of mortality amongst wild birds is in the millions rather than tens-of-thousands reported, through comparison of notification data to accounts literature.

Source: Wild birds’ plight and role in the current bird flu panzootic

Mammals

H5N1 is regularly transmitted from birds to mammals in the wild. But of course most cases are never found in the vast wilderness. According to this list maintained by FAO at least 47 species are affected. A list of all H5N1 infections of mammals in the USA by APHIS, gives an idea what kind of mammals are most commonly infected. While the list is diverse, it contains mostly scavengers like foxes, skunks and racoons.
Globally, the center of attention have been mass mortality events of seals and sea lions, which outnumber the other species with over 10.000 reported cases.

>> Mammals

Officials also reported 2 more H5N1 detections mammals—a red fox from Pennsylvania and a mountain lion from Montana—raising the total to 200.

Source: US reports a few more H5N1 avian flu detections in birds and mammals