The species of birds seen in the BOS includes residents, summer visitors, winter visitors, passage migrants and vagrants. This page shows the species seen regularly in the BOS, that is those that have been seen almost every year from 2000-2019. There are currently 130 such species. For each species the following information is provided:

  • The number of years seen from 2000 to 2019
  • The number of months each year the species is seen. This helps to distinguish visitors from residents.
  •  % Of Months - the percentage of the 240 months under review that the species has been recorded as being present. This provides an additional measure of occurence, though it is less accurate for species that we do not fully record. This figure is not provided for species we do not regularly record, i.e. very common species.
  •  Records - the number of records we hold for this species since 1982
  •  Max Flock - the maximum number of birds seen in a 1 km square per day
  •  1km squares - the number of 1km squares the species has been recorded in. This gives a measure of the distribution. There are 1200km squares in the BOS area.

 Note that you can sort the list by any of the column values, such as by species name.

Updated 26th March 2020

Due to the current Covid 19 outbreak, the BOS has cancelled the April and May indoor meetings. If the current travel & social distancing restrictions remain in place or increase, we will also have to cancel the outdoor meetings scheduled for June through August. Read more ...

This meeting has been postponed due to the COVID-19 restrictions. We will reschedule this meeting when social gathering restrictions have been lifted.

Ecology and conservation of the Sociable Lapwing. -  Rob Sheldon

Please note this is 1 week earlier than usual because of Easter

The Sociable Lapwing has suffered huge declines in range and population and is now listed as critically endangered.  RSPB is working with a number of partners on the breeding grounds in Kazakhstan and on the migration routes and wintering areas in the Middle East and Africa to work out why this enigmatic and beautiful species has declined. Read more ...

COVID-19 Update 25th March 2020: This survey will not go ahead this year due to government travel restrictions.

A survey of breeding birds, conducted using 3 visits over 3 months to a random 1km square. Read more ...

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