For months, bird flu was seemingly everywhere in the U.S.: news headlines reported the highly pathogenic H5N1 avian influenza ...

Bird flu fears have focused on the poultry and dairy industries and human health. But wild animals are threatened, too—at ...

Bird flu was nearly everywhere in the U.S.—in chickens, cows, pet cats and even humans. Cases have gone down, but experts ...

Several local factors - including the minimum temperature reached in autumn, the water level in lakes and ponds in winter, ...

Multiple U.S. states and Canadian provinces are experiencing poor air quality from wildfire smoke. Here's where.