|To:||"Canberra Birds" <>|
|From:||"Yarden Oren" <>|
|Date:||Sat, 12 Mar 2005 13:51:21 +1100|
Hope I can still add a point of view and that Geoffrey's note was not the bell telling us to stop this discussion line.
Anyhow, the bewilderment over the richness of rarity descriptors is real. Ecologists have been battling the theme long and hard with context, scale and point of view taking its toll. Rarity or for that matter abundance is rich even within a bounded area such as the ACT. Abundance (how many individuals) varies from incidence (at how many locations it is seen). Similarly spatial and temporal incidence are different again and that's even before we have thrown in spatial and temporal variability. Black HEs may be indeed vagrant in the sense that they are eruptive in their range and may appear occasionally whereas a lone Long-tailed Jaeger straying over might be a different story (anecdotally, Jaegers do migrate overland in some areas).
The point I am trying to make is that I (like Harvey ) like this richness to be captured in our descriptors when the context is right (e.g., annual reports) so that we state for example that Grey Fantails local breeders, that their abundance changes from summer to winter, or that pilotbirds are found only in the wet gullies... (or maybe were found until we start finding them again ).
This brings me to the some of the practical aspects. Indeed we wish to inform government, the community and other ornithologically oriented groups of the dynamics and thus status of birds HERE, but on the other hand the species specific descriptors will have no effect beyond our usage. The ACT government will not install a breeding program for the rare Black HE although in regional cooperation there could be programs targeting fire affected species or those extending their ranges and abundances (native or introduced). The bottom line is we should find the terminology that fits us best and that captures richness rather than trying to limit it.
From: Harvey Perkins [
Sent: Friday, 11 March 2005 2:47 PM
Subject: RE: [canberrabirds] terminology
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