Another thing to note is that birds often don't respond to a tape
because it's not the local dialect, the call being recorded in some
other part of the species' range. I'd hazard a guess that the majority
of non-migratory spp with extensive ranges have different songs in
different parts of the range.
John Leonard
2008/9/16 Chris Ross <>:
>
> I've used call playback at various times over the years often with
> photography in mind. I've made the following observations:
> Some birds respond only briefly some make a determined search for the
> intruder and others just ignore it, including species I would expect to
> respond.
> I also recall seeing posts saying " such and such a bird doesn't respond to
> the BOCA tape" implying that the bird can recognise a particular recorded
> call and choose to ignore it.
> I too have often seen birds feed in response to a call as if to say this is
> my area, look I'm using it. I wonder if the response responds to where in
> their territory the bird is. If it's on the edge of what it recognises as
> its territory it might think it's being chastised by a neighbouring owner
> and leave or if it's hungry it might continue feeding rather than respond.
> I'm of the school of thought that judicious use of calls does little harm.
> In fact as others have said it can be counter productive and cause the bird
> to "satellite" or otherwise become move around making a photo a very distant
> possibility. Individual birds seem to vary quite widely in how they will
> respond.
>
> Chris Ross
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> birding-aus.blogspot.com
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--
John Leonard
Canberra
Australia
www.jleonard.net
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