Overview of study sites and contact call variation.

<p>(a) Distribution of <i>Platycercus elegans</i> (grey overlay) showing recording sites. The yellow squares are recording sites with yellow phenotype birds; red squares are recording sites with crimson phenotype birds. The dots inside the squares indicate the mtDNA of the population: yellow dots = yellow subspecies (<i>P. e. flaveolus</i>), purple spots = hybrid Western Slopes population, red dots = crimson subspecies (<i>P. e. elegans</i>). The cut out gives a more detailed look of the six recording sites where the clines in microsatellite markers occur. The blue line denotes the Murray-Murrumbidgee river system. (b) Spectrogram with waveform of two contact calls from Berri (in the <i>P. e. flaveolus</i> distribution). (c) Spectrogram with waveform of a contact call from the clinal microsatellite area. (d) Spectrogram with waveform of two contact calls from Brungle (in the hybrid Western Slopes population).