G,day Richard and birding-aussers,
Ambrose (1982) states that approximately 400 vertebrate species use
tree-hollows in Australia, of which about 180 occur in forested ecosystems.
Approx. 28% of all amphibian species, 28% of all reptiles, 42% of all
mammals and 18% of all birds use tree-hollows.
I realise that your question Richard pertained specifically to 'landbirds',
and not 'all' species. Ambrose only provides information considering 'all'
species. One would imagine the figure of hollow using landbirds in
Australia to be considerably higher than 18%. Looks like you might have to
do some counting Richard!
Reference: Ambrose, G.J. (1982). An ecological and behavioural study of
vertebrates using hollows in eucalypt branches. PhD thesis, LaTrobe
University, Melbourne.
Regards,
Chris Tzaros
At 09:46 AM 08-02-01 +1000, you wrote:
>Hello birders
>
>Can anyone tell me roughly what percentage of Australian landbirds nest
>in tree-hollows? I know that it is very high compared with other parts
>of the world, but I am unable to track down a percentage figure in the
>literature I have to hand. Can anyone help? If so, it'll save me going
>through the list counting hollow-nesters!
>
>Thanks, Richard
>
>--
>+----------------------------------------+
>Richard Johnson
>Habitat Case Studies Project Officer
>Qld Parks & Wildlife Service
>Southwest District
>Tel: (07) 4622 4266 Fax: (07) 46 22 4151
>E-mail:
>
>
>Birding-Aus is on the Web at
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