Thank you Frank and very interesting.
As a recent 'Perthling' I was told that they were going to be tricky birds to
get locally. Good to see regardless.
I can confirm that at least two of these eight birds were begging juveniles,
the others were one sub-adult male, 2 adult females and three adult males. They
spent all day stripping the trees of seeds and only briefly returned today
before moving on.
> Date: Sat, 17 Dec 2011 12:59:25 +0800
> Subject: [Birding-Aus] Red-tailed Black-Cockatoos in Perth
> About 4 years or so ago, there was a massive bushfire in the Darling
> Range along the Brookton Highway. It seemed to me that following the
> fire, Red-tailed Black-Cockatoos began to be reported much more
> commonly on the Swan Coastal Plain. I have seen them feeding on
> Marri trees and the introduced Cape Lilac which are both reasonably
> common on the SCP. They seem to have stayed on the SCP since. There
> have even been a couple of reports of them breeding, but I am
> uncertain whether this was nest holes, or just adults feeding
> juveniles (which may still have bred in the Darling Range).
> Last year they seemed to spread out further with reports from
> Narrogin and Beverley on the eastern side of the Darling
> Range. There are some Marri trees extending that far out.
> However, this year there has certainly been a large increase in
> sightings of RTBCs on the SCP including many Perth suburbs. I had
> some fly past my house in Nedlands (near King's Park) for the first
> time. Interestingly, WA has its annual Twitchathon on the second
> weekend in December. The two previous years we overnighted at
> Dwellingup in the Darling Range (up the hill from Pinjarra). RTBCs
> could be heard at every stop around Dwellingup. But this year they
> have almost deserted the area. Maybe to the SCP? Not certain
> why. This year has been wetter than most. Perhaps the Marri trees
> have not set fruit.
> PS : They are the south west race "naso" known as the Forest
> Red-tailed Black-Cockatoo. The wheatbelt race "samueli" occurs much
> further out from Perth mainly to the north east and north.
> Frank O'Connor Birding WA http://birdingwa.iinet.net.au
> Phone : (08) 9386 5694 Email :
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