A branch of the H5N1 bird flu family tree that hadn't previously been seen in cattle has now been detected in dairy cows.

Bird flu, also known as H5N1, continues to spread among U.S. livestock, driving up egg prices and worrying public health experts.

A beauty spot in a seaside town has a suspected outbreak of avian influenza, also known as bird flu. Blackpool Council said several swans had died at the town's Stanley Park over the last few days. The deaths have been reported to the Department for Environment,

Public health and natural resource managers in both Illinois and Wisconsin are looking at, but have not yet confirmed, if bird flu is responsible for dozens of bird deaths along lake Michigan. Reports started coming in after dozens of dead ducks washed up on lake beaches between Chicago and Milwaukee.

The highly contagious bird flu has hit Montgomery County, Maryland, where officials say a backyard flock of chickens tested positive for the virus, making it the first case of a homeowner’s birds having the virus in Maryland this year and bringing the number of cases in the D.

The discovery of bird flu in the San Mateo backyard flock prompted health officials to remind people to take biosecurity measures.

Bird flu has been detected in a backyard poultry flock in San Mateo, local officials said Tuesday. No human cases have been linked to the flock, but the detection highlights the risk of H5N1 to people who live near,