Eye Shine and Owlet Nightjars

To: Andrew Hobbs <>
Subject: Eye Shine and Owlet Nightjars
From: Peter Shute <>
Date: Mon, 18 Nov 2013 18:23:21 +1100
So Owlet-nightjars don't have this Tapetum Lucidum?

I assume putting the torch closer to your eyes to help see the fainter shine 
uses the same principal as moving a camera flash further from the lens to 
reduce red-eye.

Peter Shute

Sent from my iPad

> On 18 Nov 2013, at 4:55 pm, "Andrew Hobbs" <> wrote:
> The colour of the eye reflection from the Tapetum Lucidum depends upon 
> the properties of the crystals in the layer.  It can vary more or less 
> across the full visible spectrum.  However in animals without that layer 
> the reflection is always red.  The red colour is mainly due to the 
> haemoglobin in the blood vessels at the back of the eye. (This is the 
> basis for the red eye effect in people. We don't have a Tapetum Lucidum.

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