The recording gives it away. First, a sudden plunge in altitude, then distressed bird calls before a prolonged series of ...

For the first time, scientists documented direct evidence of a bat preying on a bird at high altitude. During spring and fall migrations, billions of birds take to the night skies. The high-altitude ...

The bat—a greater noctule (Nyctalus lasiopterus)—was equipped with a high-tech tag recording its behavior. “There was this ...