Hello Mark and Amanda, In addition to regional variation , sex differences and variation between individuals already referred to, with some species (I’m not sure about Wongas) the same individual can vary the pitch of a call, usually related to the bird’s state of anxiety. However, the reason can also be electronic. If you are copying sound from CDs to your phone or iPod you will be likely copying from one format to another i.e. WAVE or WMA to MP3. If the settings for sample rate are not correctly entered, there can be a change in pitch. I have two recordings of Wongas. The one on my website is lower in pitch than David Stewarts Wonga on the Morcombe app (played on my iPod) but my other recording is roughly the same pitch as Dave’s. Regards Graeme Chapman =============================== To unsubscribe from this mailing list, send the message: unsubscribe (in the body of the message, with no Subject line) to: birding-aus-request@vicnet.net.au http://birding-aus.org ===============================
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