Sign up for free

Newsletters

Once a month
get new photos
and expert tips.

Science and Space
Main Health and Human Body Earth Space Prehistoric World A-Z

Biologists Releasing Duck

A wild duck takes to the skies over Alberta Province, Canada, after biologists tested it for avian flu. The flu virus originates in the guts of wild birds. Scientists are working to gain control of a new, deadly strain of bird flu—H5N1—that has mutated and is infecting humans.

Photograph by Karen Kasmauski