May 2, 2024 · Most wild birds infected with bird flu viruses are asymptomatic (i.e., do not exhibit signs or symptoms of illness). Some bird flu viruses can infect domestic poultry and other domestic and backyard birds, and outbreaks of bird flu in domestic poultry occur worldwide.

4 days ago · H5 bird flu is widespread in wild birds worldwide and is causing outbreaks in poultry and U.S. dairy cows with several recent human cases in U.S. dairy and poultry workers. While the current public health risk is low, CDC is watching the situation carefully and working with states to monitor people with animal exposures.

2 days ago · What is highly pathogenic avian influenza (HPAI)? In North America, a new strain of avian influenza virus was first detected in wild birds in late 2021. Soon after, the disease spread to commercial poultry flocks. Wild birds, commercial poultry, and backyard domestic birds are all at risk of becoming infected.

1 day ago · What started as a typical bird flu outbreak four years ago has evolved into a cross-species threat that's ruffling far more than feathers. As 2025 gets underway, the avian flu is ramping up. Jumping species. Dolphins and polar bears have it. So do smaller mammals such as wild foxes, skunks, and seals, leaving many dead or with neurological ...

4 days ago · Data is provided by state, county, date detected, HPAI strain, type of wild bird, and sampling source. January 14, 2024, USDA APHIS reported the first H5N1 detection in wild birds in the US since 2016.

Jan 3, 2025 · There has been widespread transmission of avian flu to wild bird species including waterfowl and raptors. The virus has also been found in mammals that prey on dead birds. However, transmission to songbirds and other typical feeder visitors has been low (about 3% of all cases reported in wild birds), although this may change with increased ...

Jan 21, 2025 · Wild birds can be infected with highly pathogenic avian influenza (HPAI) and show no signs of illness. They can carry the disease to new areas when migrating, potentially exposing domestic poultry to the virus.

In late 2021, a virulent Eurasian strain of avian influenza virus, also known as bird flu, was introduced into North America. It was detected in chickens and a wild gull in Canada. The virus can impair a bird’s nervous system, making it unable to fly and ultimately killing it.

Nov 20, 2024 · The HPAI virus mainly impacts wild birds like migratory waterfowl, birds of prey, gulls, shorebirds, gamebirds, and scavengers such as crows and magpies. These species are especially vulnerable during migration and winter, when large numbers are in transit.

The highly pathogenic H5N1 avian influenza strain circulating in the U.S.—and much of the world—is unusual for also causing disease and deaths among a range of wild birds such as ducks, crows, and eagles, with crows and eagles likely becoming infected from eating remains of …