About us News Bats at Marks Hall Marks Hall is nationally important for bat conservation. Many of the old trees and buildings provide bats with roosting and hibernation sites and the combination of woodland, pasture, lakes and ponds attract a wide variety of insects on which bats prey. The bats here have been encouraged over the last 30 years by a positive approach to woodland management that encourages biodiversity. Marks Hall has worked with the Essex Bat Group, the Forestry Commission and Essex County Council to provide hibernation sites. The old WWII air raid shelters have been adapted to accommodate bats during hibernation. As a result, Marks Hall is nationally important for hibernating Barbastelle bats and Brown Long Eared bats, and globally important for Natterers bats. More information about the programme to support bats here at Marks Hall can be found on the Campaign for Rural England website. Every year Marks Hall offers a Bat Walk, an absorbing evening with our bat expert spent exploring the estate to discover the different species of bats to be found here. Please check our events page for details about our next Bat Walk.