Our single historic record is from the St Albans area in 1901. In more recent years we have just three valid (genitalia checked) records - from the Hanwell area 6th July 2017, Welwyn Garden City, 9th August 2020 and Stevenage 25th July 2021.
Recorded in 4 (10%) of 41 10k Squares. First Recorded in 1901. Last Recorded in 2021. Additional Stats