The dark, smudgy streaks on Xavi Bou's photographs suggest the jerky ink tracks created by a malfunctioning printer, but they actually record the various patterns birds trace while flying in flocks.

Bird strikes with aircraft pose a serious threat to human safety. The problem dates back to the early days of aviation, with the first death of a pilot recorded in 1912 when an aircraft crashed into ...

After decades of frustration, machine-learning tools are unlocking a treasure trove of acoustic data for ecologists. A small songbird soars above Ithaca, New York, on a September night. He is one of 4 ...