When birds sing at the same pitch, they avoid singing at the same time

Birds singing in choruses must contend with the possibility of interfering each other's songs, but not all species will interfere other to same extent due signal partitioning. Some evidence suggests that birds avoid temporal overlap only cases where there is frequencies their songs occupy, which this behaviour varies according level frequency yet well understood. We investigated hypothesis increasingly heterospecific as increases by testing for a linear correlation between and avoidance across community temperate eastern North American birds. found was significant whole within 12 15 commonly occurring individual species, supports our adds growing body adjust timing response overlap.