How many sub forums would that make? :eek!:
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Perhaps only for a few main groups of particularly difficult to ID species. Gulls and waders would be obvious candidates and occur across different continents and regions anyway. A wader may breed in Alaska/Siberia, pass through SE Asia and winter in Australia. It may also occur as a vagrant in Europe.
Anyway like you say something will have to be done and regional division is a good a solution as any.
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