It’s difficult to ID Eastern and Western screech-owl species—location is your best bet. Hear their call and learn about their ...

The sound was unmistakable and led me outdoors to face the thick woods across the road. In the advancing twilight the sound pierced the darkness again, and then again. The ghostly mournful wail, best ...

Part 1. 'I don't do calls' -- Crossing the sound barrier -- Tone and timpre -- Pitch and frequency -- Rhythm and timing -- Part 2. Put it all together and what have you got? -- Simple calls -- Simple ...

The BirdNET app, a free machine-learning powered tool that can identify over 3,000 birds by sound alone, generates reliable scientific data and makes it easier for people to contribute citizen-science ...