Migrating Birds Sing to Team Up with Other Species

New research reveals that solitary songbirds, such as grosbeaks and warblers, may cooperate across species during their nocturnal migrations. Traditionally thought to rely solely on instinct and memory, these birds use specific vocalizations to communicate while traveling vast distances. A study led by Benjamin Van Doren of the University of Illinois Urbana-Champaign analyzed over 18,300 hours of bird flight calls using machine-learning technology. It found that birds from different species often fly in proximity and exchange information, suggesting social interactions influence their migratory behavior.

These vocal exchanges may help birds navigate by sharing knowledge about safe landing spots or adverse weather. While the precise information exchanged remains uncertain, the findings challenge the belief that songbirds migrate independently. This study highlights the complexity of bird migration and suggests interspecies cooperation plays a more significant role than previously thought. Future research aims to track individual birds to better understand their migratory strategies.