To: <>
Subject: Bats
From: Julian Robinson <>
Date: Sat, 02 Feb 2008 11:35:16 +1100
Many years ago, and tangentially relevant, at least to large flocks discussion, I had the task of investigating problematical interference to Sydney Airport air traffic control radars.  Every evening the operators complained that they lost aircraft in a huge blob of something right on the main approach coming in over the northern suburbs.  It turned out to be a monster colony of flying foxes (don't remember which one) in a secluded valley near Gordon(?). Every evening when they decamped there were so many and spread so widely that they would cover dimensions of a few km on the screen, blotting out the (primary) returns of aircraft overtop.

I had the opportunity to visit the colony, it was damned impressive although not an olfactory sensation


At 01:16 AM 2/02/2008, John Rawsthorne wrote:
Here in Forbes (central NSW, not really in COG territory at all) I regularly see one or two fruit bats each night over summer, presumably little red flying foxes.  However, last night I was astonished to see hundreds and hundreds? and hundreds, flying past at maybe 100m above ground level, heading northwest.  I only had a part-sky view from my verandah and only started taking notice after they had been going for a while, but estimated that I watched 6,000 fly past in a fifteen minute period in the last light of dusk.  I saw a few tonight doing a similar thing, but maybe only a couple of hundred in total.  Do these critters make mass migrations?
John Rawsthorne
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