Two teams of ten participants spent the night of 23.6.17, harp trapping bats, as part of the National Nathusius' Pipistrelle project. We surveyed five sites last year and intend to cover a similar number of local water bodies this year; starting at two lakes at different locations across the Hogsmill Sewage Works.
The eastern lagoon forms part of the nature reserve, which is open to the public (on obtaining the code from Kristine Boudreau, Hogmill Reserve Manager:
Recently a second bird hide has been installed and lower water levels and habitat improvements have provided plenty to watch and listen, including a cettis warbler. The reserve is rarely seen at night so although small numbers of swifts and house martins breed locally along Chiltern Drive, we were surprised to see ~100 swifts feeding well after sunset.