Woodswallows behaving like Swifts

To: "Birding-Aus" <>
Subject: Woodswallows behaving like Swifts
From: "Val Curtis" <>
Date: Sat, 3 Nov 2007 10:01:16 +1100
Gembrook, Victoria. (75k west of Melbourne)

On Sunday 28th October I saw a flock of woodswallows, most probably White-browed or possibly Dusky, circling very high over my house. I have recorded White-browed here once before a long time ago.
The area is tall, closed eucalypt forest with open farmland not far away

It was about 30 minutes before sunset and there was a storm approaching, lots of heavy dark clouds and very little wind. They were behaving as I would expect to see swifts behave in the conditions, circling very high over the trees which are about 60 meters tall (I think!) and some of the birds were at least that high again, some so high I could barely see them with the naked eye in the poor light. At a conservative guess there were about 40 that I could see, but there could have been many, many more out of my field of view behind the tree tops

I was unable to positively identify the species but they all appeared uniformly dark underneath in the poor light and were calling constantly with a gentle 'chup, chup' sort of sound.

Is this a know bebaviour of Woodswallow species?



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