The Summer Random Square Survey (SRSS) was established in 1991 to provide details on the birds that breed within the BOS survey area. Like the WRSS, this survey was established because this information was not beeing captured by our monthly recording system.

Each year 1km squares are chosen at random from each for the 12 100km squares, skipping squares that have already been surveyed. Observers are asked to make at least 3 site visits, 1 month apart, starting from late April. Participants record the activity of each bird seen, with the focus on evidence of potential breeding, along with the number of pairs observed. At the end of the survey observers are asked to estimate the total number of breeding pairs for each species. The estimate is reviewed and adjusted by the bird recorder to take account of the type of breeding evidence recorded, with emphasis given to direct breeding evidence.

The analysis method follows that of the WRSS. The first 3 years of results were averaged to produce a normalised index with a value of 100. For each subsequent year, a 3-year index value relative to this base figure is calculated. This provides a long term trend which shows the breeding trend status of common species across the BOS.

To date 375 squares have been surveyed, over 30% of the BOS.

The results of the survey can be read in our book Birds of the Heart of England.

We need your help to find Swifts and their traditional nest sites in Anglican churches.  50 years ago most of our local parish churches had nesting Swifts.  Chris Mason brings us up-to-date  . . . Read more ...

(Please note the earlier time to maximise daylight.)

We will visit Compton Verney, CV35 9HZ, on the B4086 between Wellesbourne and Kineton. Read more ...

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

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