Little Corella

To: <>
Subject: Little Corella
From: "Philip Veerman" <>
Date: Mon, 2 Apr 2012 11:53:28 +1000
Yes all fine. I suspect several 'catchment areas' for the local Little Corellas, e.g. large numbers around Erindale would seem unlikely to be the same ones as Michael describes. As for Regarding competition between the 2 species, due to body size they have different cavity requirements. Very likely there will be separation but I wouldn't think a big amount. Hollows don't come in two sizes but all sorts of random forms. Some will be favoured by just one species but for such adaptable species there is surely a big overlap too, very likely the overlap is bigger between Galah & Little Corella.
Another point in passing, these are likely to be very long lived birds. Quite possibly some of the Sulphur-crested Cockatoos now being recorded were already alive and breeding when the GBS started in 1981. So trends on breeding etc (especially declines) could take a long time to show.
-----Original Message-----
From: Michael and Janette Lenz [
Sent: Sunday, 1 April 2012 6:17 PM
To: Con Boekel;
Subject: Re: [canberrabirds] Little Corella

your morning flock of Little Corellas may have come from the ANU roost where actually both species roost together (I think Leo Berzin provided to the chat line some figures on totals for both species from a mid winter count, last year)).  Of course, we do not know the size of the 'catchment area' for this population coming to roost at the ANU. To judge by the L. Corellas I see crossing Lyneham in the morning (often in various directions), they may well travel some distance to their day-feeding grounds.
Regarding competition between the 2 species, due to body size they have different cavity requirements. The smaller  L.  Corella may have better chance of finding a suitable hollow (or may find a hollow in younger trees) than an SCrCockatoo may be able. The L. Corella may then be more likely to be in competition with the Galah, as was already mentioned in another message.
Also many thanks to Martin B for the various graphs, including the latest set. Great that Martin can draw from the full spectrum of GBS data, and hence can give a most comprehensive picture.
Michael Lenz
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