Hi
Geoffrey,
I might
just be nerdy enough to answer that one. I believe that British Ornithologists
Union Rarities Committee assesses the first record of a species for the British
Isles and Northern Ireland. This falls within their role as the custodians of
the official British bird list. I think they made the decision a long time ago
that the workload in assessing any further records of vagrant birds to their
geographic area (so 2nd, 3rd, 100th, records
etc) was too great a task for them and was not part of their
‘scientific’ role.
As such
once a bird is already on the British Isles and Northern Ireland list, further
records of these vagrant species are assessed by the British Birds Rarities
Committee.
The
British Trust for Ornithology has always focussed on ringing projects, bird
population studies, and even the major garden bird surveys in the UK.
Cheers Dan
-----Original
Message-----
From: Geoffrey Dabb [
Sent: Friday, 13 August 2010 11:45
To:
Subject: RE: [canberrabirds] taxonomic references
The BOU was formed in 1858 as a scientific organisation.
The RSPB (founded 1889) is essentially a conservation organisation. The
British Trust for Ornithology dates from 1932. The BOU for more than a
century has been the custodian of the British bird list.
Only the most learned students of the arcane world of bird
organisations will be able to tell you why there is both a British
Ornithologists Union Rarities Committee and a British Birds Rarities Committee.