Cas,
There is a large summer population of Little Corellas in Sydney's Inner  West 
(I 
reported a few times: they usually are around from the  1st/2nd week of January 
to some time in April). There is a roost  at War Memorial Park,  Leichhardt 
(Catherine and Moore St). I never counted them (I should),  but my impression 
is 
that there are approximately 200 around dusk and  much fewer later in the night 
(11pm).  Maybe they fly from a dusk roost to a night roost later in the night?  
(Similar to what corvids do). If this is true, it may explain the midnight 
flights.
February 2010, Nathan Ruser made a similar observation to yours and reported it 
on Birding-Aus.
Cheers,
Nikolas
 ----------------
Nikolas Haass
Sydney, NSW
----- Original Message ----
From: Cas and Lisa Liber <>
To: 
Sent: Wed, February 23, 2011 7:32:48 AM
Subject: Corellas at midnight?
Last night around midnight I heard a large flock of Little Corellas fly over
Marrickville - anyone encountered this before?
Cas
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