Since its formation in 1933, BTO has been deeply committed to gathering quantitative
information on the bird populations of the UK. Its nationwide network of skilled volunteers …

The value of the monitoring work undertaken by the BTO is recognised in the Government's
Biodiversity Steering Group report (Anon. 1995). The BTO's results, particularly on declining …

Survey and monitoring form the bedrock for conservation. Without knowledge of the
distribution and size of populations and how they are changing, the actions of …

The BBS is the main scheme for monitoring the population changes of the UK's common and
widespread breeding birds, providing an important indicator of the health of the countryside …

There have been significant declines in the extent and quality of semi-natural agricultural
habitats in England since the 1930s. Species occurring both in these habitats and in …

It is important to monitor bird populations both in their own right and as indicators of the
general health of wildlife habitats. The objectives of the British Trust for Ornithology's …

For almost four decades the British Trust for Ornithology has monitored populations of the
commoner 35–50% of species of British breeding birds. The monitoring involves …

1 RSPB Centre for Conservation Science, Unit 14 Llys Castan, Parc Menai, Bangor LL67
4FH. 2 RSPB Cymru, Unit 14 LLys Castan, Parc Menai, Bangor LL67 4FH. 3 British Trust for …

Birds are potentially valuable indicators of some aspects of the quality of the countryside for
wildlife. Furthermore, trends in bird populations form one of the 15 Quality of Life headline …

Periodic reviews of the status of biodiversity are widely recognised as an important step in
conservation prioritysetting, and are used in many parts of the world. The concept of a 'traffic …