Rookeries have been surveyed in Hertfordshire for many years, and in 2021 the Bird Club has received records of over 4000 nests from more than 200 rookeries.  This year a new interactive map has been produced to show the sites and nest counts, as well as known sites that have not yet been checked, and sites previously used but found to be abandoned this year.

It is not too late to contribute by checking the outstanding rookeries or submitting details of other unrecorded sites via the records submission page. Please include a nest count and grid reference where possible

The map can be found here

Any feedback or errors with the map can be sent to Graham Knight: