Hi Tony and birding-aussers, some detail for you on how bird distribution
data is shown on Atlas of Victorian Wildlife maps (and other systems as
well)
The data you refer to is based on specific locality records but shown on
published maps as grid cell records (either 5 minute or 10 minute grids).
The grid records for Brolga in the Barmah area are based on observations
of the species from Picola and Yalca North (north of Nathalia). When
these are converted to box-shaped grids the area on maps appears to cover
Barmah Forest.
I've just checked the atlas maps for the Brolga and indeed sightings for
the species in this area are ALL well outside the forest boundary.
So yes, this is '... just a quirk of reporting'. Thanks for asking this
question, a very pertinent observation on how peoples sightings are shown
on maps.
cheers, Martin
Martin O'Brien
Wildlife Biologist - Threatened Species & Communities Section
Department of Sustainability and Environment
2/8 Nicholson St.,
East Melbourne 3002
VICTORIA
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