The BOS has published annual reports since 1966. Each report summarises the activities of the society over the year and a review of the bird sightings.

A status update is provided for each of the reserves the society owns and manages. A detailed report on the ringing undertaken is provided along with results. Fieldwork activities, including a our summer and winter surveys, is summarised. A major part of the report is the Systematic List, which is an annual review of the sightings and status for each of the bird species on the list.

Each member of the BOS is supplied a printed copy of the Annual Report as part of their membership fee. Copies of the report are distributed to the county bird clubs and national ornithological organisations.

Digital copies of older reports are available for reading from the list presented below. Note that the reports from 1989-2002 have the membership list omitted since those reports also included the addresses of members.

Content may be reproduced in part as long as it is suitably credited to the society and, where relevant, the author of the material.

A combined list of contents has been compiled to make it easier to locate specific material: Contents of BOS Annual Reports.

UK currently holds approximately a quarter of the global Curlew population, with estimates for England of about 30,000 pairs. National monitoring data show that this population has been in long-term decline since the 1970s and has almost halved in the UK over the last 20 years. In lowland southern England, the population has declined to about 500 pairs, with many colonies on the verge of local extinction. Read more ...

A leisurely walk led by Mike Lewis around Compton Verney - landscape created by Lancelot "Capability" Brown in the eighteenth century, comprising parkland, two large lakes and mature mixed woodland including some very large cedars around the mansion. Read more ...

A survey where observers are each given a randomly selected 1km square and record all the species encountered and numbers of each for a minimum period of 2 hours between 9am and noon. Read more ...

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