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.