This flagged up a new-to-us species, the brown long-eared bat. The common is clearly an important foraging and potential roosting site for numerous bats. It is important that we try to minimise light pollution within and around the edges of the common as this can affect behaviour and deter these nocturnal creatures from important feeding sites, such as the Beverley Brook.
Species found on Barnes Common can be found in the Mammals tab of Species List: Fauna (related link below)
Banner Credit: Tom Marshall. Wildlife Trusts