H5N1, an avian flu virus, has killed tens of thousands of marine mammals, and infiltrated American livestock for the first time. Scientists are working quickly to assess how it is evolving and how much of a risk it poses to humans.
Some poultry growers are turning to innovative tactics to protect their flocks, deploying deterrents like drones, air horns, balloons and decoy predators.
Some poultry growers are turning to innovative tactics to protect their flocks, deploying deterrents like drones, air horns, balloons and decoy predators.