Kindrogan Dawn Chorus Chronology

I've been noting the chronology of species joining the dawn chorus since 2003 at Kindrogan Field Centre in Perthshire, Scotland. This occurs in the first or second week of June when I’m present on a university field course. While this phenomenon of gradual song burst leading up to sunrise (approximately 04:28 on 5 June 2013) probably peaks sometime earlier in May, many species are still clearly defending territories from neighbouring males, guarding fertile females from extra pair copulations, or in some cases still attempting to attract a mate, or additional mates. Here is the chronology from a typical morning on 5 June 2013 with 50% cloud cover and almost no wind. Listen to an excerpt of the dawn chorus from a sound recording made that morning featuring Robin, Great Tit, Wren, Blackbird, Song Thrush, Goldcrest, and Treecreeper.  



Click the images to enlarge.

The chart shows the time at which the first song from each species was noted from the Robin starting at 03:05 to the final species, Spotted Flycatcher at 04:11. The waveform shows the relative sound intensity recorded with the built-in mics on my sound recorder.

The north-west end of Strathardle, looking south-east from Creag na Cuinneige. Straloch Loch is in the foreground, Kindrogan Hill on the right