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Old Tuesday 6th January 2015, 11:35   #3
dantheman
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Join Date: Dec 2005
Location: Cornwall
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Also some peoples hearing is better than others - owls some kilometres off may be heard by some but not by you (also some frequencies).

There is also a possibility that if people are using playback in a limited area, then different groups could be hearing each others playbacks, with no real owls actually calling in the area at the time! (It has happened).

Time of night may be an issue, although don't know the specifics for your species - some species will be more vocal after midnight for example (but sounds like you may have that covered if you just got back).
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