I think it would be highly unlikely that your Amadale flock was Western.
Western Corella is very uncommon in the greater Perth area, and records usually
involve one or two individuals. The northern population occurs in the wheatbelt
north-east of Perth, including around towns like Moora, Wongan Hills, and New
Norcia, and can approach the outskirts of Perth around Bullsbrook (not sure how
regularly, but I've seen them there a couple of times). The southern population
is restricted to the Rocky Gully/Lake Muir area in the deeper SW.
Little Corella and Eastern Long-billed Corella are both resident and well
established around Perth. Overall Little is probably commoner, but the relative
abundances of the two species vary locally across Perth. Both are considered
pests as they compete for nesting hollows with native parrots and cockatoos
(plus noise and damage to grassed areas).
Mixed flocks are reasonably regular and Little & ELB occur together in many
areas of Perth. In the wheatbelt north-east of Perth, mixed Little/Western
Corella flocks also occur.
Hope this is what you were after
PS - Eremaea is not widely used in WA, so I would excercise some caution using
it for WA as it gives misleading distributions for a couple of species
> Date: Thu, 22 Sep 2011 08:01:20 +0930
> Subject: [Birding-Aus] WA Corella location status
> Hi Folks,
> I have recently been in the land of WA around South Perth.
> I am curious as to the location status of Corella's over there as I have
> found researching on the net somewhat confusing.
> I am to assume from Eremaea and Media reports that the Eastern Long-billed
> Corella is now resident there and becoming a pest? True?
> What about Western and Little.
> Do they co-habit? I am assuming a large flock around Armadale to be Western?
> Cheers and thanks in advance.
> Steve Potter
> Adelaide SA
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