G'day birders,
I forwarded the original question to a friend who works in wildlife research
who often uses call playback for surveys etc.
" Has anyone out there have any actual evidence that tape playback in
moderation is actually harmful to birds? "
This is a more polite version of his answer.
Cheers
Graham Turner
"A better question is does he have any evidence that it doesn't.
I think I told you before that territorial response in some species,
even natural response can be sufficient to cause nesting to fail. This
has been seen in Boobooks by Olsen and Trost.
The long and the short of it is that 'Twitcher' is not going to
stick around after getting his TICK to see what the effect was. Unless
he is going to stick around and conduct some psychopathology on him.
What does he achieve with playback.
If he is twitching, probably just a TICK.
If he is surveying for a reason he may get useful distribution
information.
If he is studying behaviour or ecology he will probably have just
screwed up a period of his study.
With playback he may have just screwed up someone else's study.
He may have just disrupted a critical phase of breeding.
He may have just damaged someone else's chance of getting a TICK."
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