Putting TYL in perspective

To: COG List <>
Subject: Putting TYL in perspective
From: Martin Butterfield <>
Date: Mon, 16 May 2016 08:05:24 +0000
Amongst the results of the Global Big Day it is possible to look at birds according to the maximum number at a hotspot.  The 5th biggest flock was 5,000 Plumed Whistling-Ducks at Hasties Swamp in Queensland.  The observer noted "estimate based on photo of part of the mass present"!

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