Welcome Swallow feeding clarification

To: birding-aus <>
Subject: Welcome Swallow feeding clarification
From: jenny spry <>
Date: Mon, 1 Jul 2013 14:49:54 +1000
Hi all,

I have had a couple of emails asking me to clarify what I mean by
"sub-surface" prey and feeding.

What I mean is that the prey being taken was not AT nor was any part of the
prey breaking or extending above the surface of the water. This is
explained in my blog (click link below my name) in more detail.

The prey being taken was swimming, or suspended, in the water column at
depth of between 2 mm and 20 mm below the point where any part of its body
would break the surface. I have not tried this before but it may show
graphically in an email thus:

*Air*_____________________________ Surface of the water
_____________________________ Depth of water between here and surface
between 2mm minimum and 20 mm maximum
Prey species were being taken from below this depth.

What I am trying to emphasise is that no portion of the prey was breaking
the surface of the water when it was captured.



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