> Ashwin....This subject was discussed last year on birding-aus. Someone (I
> can't remember who) reproduced a discussion of this very question by
> Professor Jack Pettigrew from University of Queensland who has studied the
> physiology of bird vision. If I recall, the bottom line was that birds are
> able to withstand the effects of bright light much better than we are, but
> I
> suggest you check the archives and read his enlightened comments for
> yourself.
> Steve Murray

> -----Original Message-----
> From: birding-aus-boun...@vicnet.net.au
> [mailto:birding-aus-boun...@vicnet.net.au] On Behalf Of Ashwin Rudder
> Sent: Saturday, 10 May 2008 11:38 AM
> To: birding-...@vicnet.net.au
> Subject: [Birding-Aus] spotlighting and bird's eyes

> g'day

> i was spotlighting some White-throated Nightjars last October, when i
> began
> to wonder what the bright beams of spotlights actually do to nightbirds,
> and
> just bird in genral, eyes.
> when humans look into a bright light for too long, they suffer permanent
> or
> temporary eyesight damage. I was wondering if this is the same for night
> birds?
> also, is there a difference in damage between different bulbs, eg LED,
> Xenon, Krypton, etc?
> Which is easier for spotlighting and identification, as well?

> Thanks in advance,

> Ashwin
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