Dear all From Stephen Debus Regards Shirley —– Original Message —– From: “Stephen Debus” <sdebus@une.edu.au> To: “Shirley Cook” <shirleycook@skymesh.com.au> Sent: Tuesday, December 03, 2013 5:50 PM Subject: Re: Fw: [Birding-Aus] Collared Sparrowhawks & Pied currawongs > Hi Shirley, > > Not much I can add to what I said in the book, except that it was based on > documented cases of currawongs doing just that, i.e. robbing adults of > prey, dragging a sitting adult sparrowhawk bodily off a nest (and blinding > one in an eye, if I recall), and taking nestlings. I also saw a currawong > take a week-old Little Eagle chick. Currawongs often harass raptors and, > for any species Little Eagle size or smaller, would try to rob their nests > if the chance arose. But the larger raptors (Brown Goshawk and upwards) > can turn the tables and eat currawongs or their young. > > A big factor in the currawong population explosion is high winter survival > because people grow the exotic, invasive berry-bearing trees and shrubs > whose fruits the currawongs eat and disperse, so it’s an upward spiral as > these environmental weeds invade bushland and support more currawongs, > which spread the weeds further via their regurgitated pellets full of > seeds, and on it goes. > > Cheers, > > Steve > > > > > At 07:37 AM 2/12/13, you wrote: >>VERY MUCH over to you, Steve >> >>Regards >>Shirley >>—– Original Message —– From: “Andrew Thelander” >><thelander.a@gmail.com> >>To: “birding-aus Aus” <birding-aus@vicnet.net.au> >>Sent: Sunday, December 01, 2013 10:41 AM >>Subject: [Birding-Aus] Collared Sparrowhawks & Pied currawongs >> >> >>>Hi all >>> >>>I see in The Birds of Prey of Australia: A Field Guide by Stephen Debus >>>(OUPA, 1998) page 90, he refers to the population explosion of Pied >>>Currawongs in SE Australia as a potential threat to the Collared >>>Sparrowhawk. Currawongs are “a predator and competitor capable of robbing >>>and injuring adults and killing nestlings.” Stephen is an authority in >>>this field and has a wealth of information. Currawongs have invaded >>>Brisbane over the years and are nesting in the city. I have also recently >>>found a Collared Sparrowhawk nest which has just been abandoned by the >>>birds for reasons unknown. >>> >>>Does anybody have any information about Currawong/raptor interactions? It >>>seems the currawongs are here to stay in Brisbane. >>> >>>Regards >>> >>>Andrew >>> >>> >>> >>> >>> >>>=============================== >>> >>>To unsubscribe from this mailing list, >>>send the message: >>>unsubscribe >>>(in the body of the message, with no Subject line) >>>to: birding-aus-request@vicnet.net.au >>> >>>http://birding-aus.org >>>=============================== > > > > —– > No virus found in this message. > Checked by AVG – www.avg.com > Version: 2014.0.4259 / Virus Database: 3629/6885 – Release Date: 12/02/13 > =============================== To unsubscribe from this mailing list, send the message: unsubscribe (in the body of the message, with no Subject line) to: birding-aus-request@vicnet.net.au http://birding-aus.org ===============================
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