FW: [canberrabirds] Cockatoos dropping rocks

To: "" <>
Subject: FW: [canberrabirds] Cockatoos dropping rocks
From: Geoffrey Dabb <>
Date: Thu, 10 May 2018 23:32:46 +0000

The story may have originated from the tendency of the SCC to drop quite heavy cedar cones.  Beneath a large nearby tree I have occasionally heard a heavy thump caused by a near miss from a cone dropped by a cocky taking flight.  Just now I gathered a selection of discarded cones which I weighed at around 70g.   However, those were dried cones.  When green they could be at least 200g.  Cockies taking off with cones carry them in the bill, typically with an insecure grip on the outer layer of a whole cone.  I do not believe they would be capable of holding a ‘rock’ larger than a golf ball, putting to one side any reason they might have for doing so.  Seasonal attacks on green cedar cones can be seen around the older suburbs of Canberra, I’m sure.  They can be carried for some distance by disturbed feeding birds.





From: Charles Buer [
Sent: Thursday, 10 May 2018 10:56 PM
To: Graeme Clifton
Cc: Matthew Willis; CanberraBirds
Subject: Re: [canberrabirds] Cockatoos dropping rocks


When we lived in Kambah, several cockies were used to coming to our bird feeder. We were  late putting seed out one morning and Margaret was hanging clothes on the hills hoist. Two cockies were in the tree above her and plucking branches off and hoiking them toward her to get her attention. This went on for 10 minutes or so until she gave in and got the seed for the feeder.

Charles Buer


No fixed address, use if necessary:


38 Birchmans Grove

Wamboin, NSW 2620


Mobile: 04 3738 1464


Sent from my iPad

On 10 May 2018, at 21:41, Graeme Clifton <> wrote:

Hi Matthew,
Sounds like a “wind up” to me.


Sent from my iPad

On 10 May 2018, at 9:14 pm, Matthew Willis <> wrote:


A strange question...


A friend of mine is moving into a new apartment in Gungahlin with a big balcony. The building design means it extends much further than those above.


She came home the other day to find a smashed tile and a shattered rock nearby. She assumed it was dropped (accidentally or not) from one of the balconies above and asked the strata manager to investigate. Their reply read in part:


"I have spoken to our facilities manager and he has said that it is surprisingly common for cockatoos to fly and drop rocks and that this has been the case with a few other complexes across Canberra".


Has anyone come across such behaviour among Canberran cockatoos?


Thank you!



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