[Syrphidae] IUCN Red list Hoverflies: calculation AOO

[wout.opdekamp at gmail.com]

Hi,

I'm trying to find more detailed information on how the Area of Occupancy
has been assessed in the IUCN Red List. Unless I misread this information
is lacking. In Version 3.1 of the  IUCN RED LIST CATEGORIES AND CRITERIA
attention is drawn to the fact that assesment scale impacts the outcome but
without giving general guidelines.

More specifically I would like to know which AOO would be attributed to a
species known from for instance 10 fragmented (>5km distance between
patches) patches of suitable habitat. Let's say individual patch vary in
size but never exceed 5ha.

Could anyone clarify this?


Regards,

Wout
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