I went for a walk with my son and a friend up to Old Joe, on the border
between ACT/NSW at the NE corner of Goorooyaroo.
Birds were not particularly plentiful (this was Friday morning), but we
did have one really interesting observation.
A wedgetail flew above us while we were at the top of Old Joe. But
rather than riding the wind currents, he/she did a series of 6 or 7
"scallops"-flying up to almost vertical, stalling, accelerating down,
and repeating-all with nary a flap although the bird was clearly
altering her wing shape. It just did the once, over maybe 400 or 500
metres and afterwards reverted to a much more normal soaring/circling
pattern.
Has anyone else observed this pattern in eagles or other raptors?
I can't think of seeing anything like it-the closest I can come up with
was watching white-necked ravens on an African mountain top which were
doing somersaults in the wind-which at the time I thought of as play.
thoughts?
Cheers,
Peter
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