birding-aus

Collared Sparrowhawks vs Pied Currawongs

To: "'Paul Jacobson'" <>, "'Baus Aus'" <>
Subject: Collared Sparrowhawks vs Pied Currawongs
From: "Steve Murray" <>
Date: Thu, 19 Apr 2007 17:39:34 +1000
Paul...just 3 days ago I witnessed an attack on a Torresian Crow by a
Collared Sparrow Hawk in Cooloola National Park QLD. The Crow was actually
bigger so I guess it was a territorial display.
Cheers Steve Murray

-----Original Message-----
From: 
 On Behalf Of Paul Jacobson
Sent: Thursday, 19 April 2007 9:15 AM
To: Baus Aus
Subject: Collared Sparrowhawks vs Pied Currawongs

Our walk to work this morning Nicole and I noticed that the 2 Pied  
Currawongs (reported to bird-line on Tuesday) have moved to the area  
behind the Royal Childrens Hospital in Royal Park (Melb). This has  
been Collared Sparrowhawk "turf" over the past 18 months (since we  
first noticed the CSH's) and it soon became apparent that the Pied  
Currawong's were unwelcome visitors. We watched for about 10 minutes  
whilst three Collared Sparrowhawks (we had previously only seen 2  
CSH's in this spot) chased and were chased one of the Currawongs.  
Just as we were leaving the second Pied Currawong flew into the gums  
from a scrubby patch of trees near by.

We've seen the CSH's taking on Magpies in the past, and have wondered  
if they were defending territory or actively hunting the Magpies. In  
the case of the Magpies the pursuit was distinctly one sided.  The  
Currawong was harassing the CSH's as much as it was being harassed,  
so I'm guessing that this is purely territorial.  I've had a quick  
look in Stephen Debus' "Birds of Prey" and can't find any mention of  
CSH territorial behaviour.  HANZAB is apparently similarly unhelpful  
on this aspect of their behaviour. I was wondering if any one knew of  
a source that discusses CSH territorial behaviour or could shed some  
light?


cheers
Paul
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