During migrations over thousands of miles, songbirds rest during daylight hours and fly at night. In contrast to the many larger birds flying in flocks, songbirds tend to fly solo. How do they find their way and stay safe in the process?

Researchers may have found some clues. After analyzing over 18,000 hours of audio from microphones placed across the U.S., they noticed chirp patterns from flying songbirds. Coupled with information from a bird call identification program, it appears that different species of songbirds occasionally fly near each other, potentially communicating social, navigational and weather information.

Mixed species of songbirds have been known to team up to forage and avoid predators, so perhaps they’re onto something.