Canadian Geese are musically dimorphic, meaning goose males and goose females sing different songs, or in this case, different notes. The male goose sings “a-honk” in F, and the female goose sings “a-hink” in G. Between the couple, is the interval of a whole tone. Drag over ‘dem noteheads below.
Try rolling the mouse back and forth between the male and female to hear what a whole tone flock sounds like, a-honking and a-hinking. While the ornithologist might be content with recording goose song (not to mention, tagging and bagging the musicians), maybe even releasing an album: Sounds of the Pond, expecting listeners to hear the ‘Sounds’ as Music (since it’s playing back on a polycarbonate disc after all), the zoomusicologist might find herself, stalking said pond, trolling its shores, with a small field guitar in hand, ready to maintain jam-eostasis with an F9 Chord. Try dropping a few F9-bombs, and then lay a few a-honks and a-hinks on top.
 Musical Dimorphism http://www.losdoggies.com/archives/35