In the late 1970s, through a collaborative work with Florian von Schilcher, Hall successfully identified the nervous system regions in Drosophila that contributed to the regulation of male's courtship songs [REF].
Suspecting the period mutation for abnormal sleep-wake cycles-generated by Ron Konopka in the late 1960s-might also alter courtship song cycles, Hall and Kyriacou tested the effect of mutations in the period on courtship song [REF].