A sheep infected with bird flu will ring another alarm bell as the virus continues to drift into mammals. It's the first time anywhere in the world that a sheep is known to have been infected.

March 24 (Reuters) - Highly pathogenic avian influenza, commonly called bird flu, has increasingly spread to mammals and infected hundreds of people, raising concerns that it may lead to human-to ...

(Dominique Faget/AFP via Getty Images) Bird flu is at a dangerous point in the United States: Nearly 167 million birds have been impacted by the H5N1 strain since 2022, and 70 people have been ...

Bird flu has ripped through the animal kingdom for the past few years now, killing countless birds and crossing into an alarming number of mammals. Yet people remain largely untouched. Even though ...

The ongoing spread of the highly pathogenic bird flu worldwide is reaching an “unprecedented” scale, a United Nations agency warned Monday. Speaking at a conference in Rome, key members of the ...

(AP Photo/J. Scott Applewhite, File) Bird flu has devastated poultry and dairy farms, and sent the price of eggs soaring in the United States since it was first detected in North America in late 2021.

Pitch determines how high or low a sound is — for example, the chirp of a bird versus the growl of a dog. Harmonic structure defines tonal quality, distinguishing a piano note from a frog’s croak.