Figure 1 shows a drone emitting several "masking" sounds during a delivery, including animal or bird sounds over a forest, urban sounds over a city and customer-selected tunes as the drone approaches ...

When you think of birds imitating sounds, parrots and starlings might come to mind. They’re famous for copying human speech, ...

NPR's Scott Detrow speaks with Matthew Medler of the Cornell Lab of Ornithology about the best bird sounds of 2025 from their vast collection of recordings, and why their selections made the list.