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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
  • Patagonian Sea lion, Otaria flavescenson rocks in the Pacific, Peru
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  • 2M9MH94 Municipal workers collect dead pelicans on Santa Maria beach in Lima, Peru, Tuesday, Nov. 30, 2022. At least 13,000 birds have died so far in November along the Pacific of Peru from bird flu, according to The National Forest and Wildlife Service (Serfor) on Tuesday. (AP Photo/Guadalupe Pardo)
  • Red-Tailed Hawk Eating Captured Rabbit
  • Golden eagle, aquila chrysaetos, standing on a dead fox and feeding with its flash in autumn nature. Wild bird of prey tearing pieces of a kill on a dry grass in autumn nature with blurred background.
  • An eviscerated gannet washed up on Bain's Beach in Lerwick, Shetland UK.
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  • Fox on the summer meadow. Red Fox with prey, Vulpes vulpes, wildlife scene from Europe.
  • Black cat with a bird caught in the teeth
  • 2JJB5DN The National Trust team of rangers clear deceased birds from Staple Island, one of the Outer Group of the Farne Islands, off the coast of Northumberland, where the impact of Avian Influenza (bird flu) is having a devastating effect on one of the UK's best known and important seabird colonies with 3104 carcasses recovered by rangers so far. The National Trust, who care for the islands, have warned this number could be the "tip of the iceberg" as cliff nesting birds, including guillemots and kittiwakes, will have fallen and been lost to the sea. Picture date: Wednesday July 20, 2022.
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