Until recently, all detections of bird flu in dairy herds in the U.S. had involved a form of the virus known as B3.13, while D.1.1 had been limited to migratory birds and poultry birds.

Recent sightings (through Dec. 10) as reported to Mass Audubon. The spotted towhee continued at the Provincetown Airport, and the Western tanager reappeared along Race Point Road. Sightings at ...

Recent bird sightings reported to Mass Audubon: Last week’s most notable sightings were a Western grebe at Winthrop Beach, a Townsend’s warbler on the Alewife Linear Bike Path in Cambridge, a ...