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From: Andrew Taylor <andr...@cse.unsw.edu.au>
Date: Mon, 12 May 2008 12:15:54 +1000
Local: Sun, May 11 2008 10:15 pm
Subject: Re: [Birding-Aus] spotlighting and bird's eyes
On Sat, May 10, 2008 at 06:06:32PM +1000, Michelle Plant wrote: Red filters are commonly used on torches/spotlights to reduce disturbance of > I cannot think of the name of the filters, > but they must be fairly common these days... to provide some > protection for critters when spotlighting... mammals and sea turtles. But turtles and many mammals have less visual sensitivity in the red part of spectrum than we do. But I doubt it will work for most birds - they have broader visual sensitivity than we do. Unless you go to a night-scope and infra-red illumination. Andrew To unsubscribe from this mailing list, You must Sign in before you can post messages.
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