Evidence-based bat conservation measures at underground sites

Although numerous conservation interventions have been implemented at underground sites, information on their effectiveness remains limited, fragmented and not systematically collected or standardised. In particular, documented examples of unsuccessful or detrimental measures are scarce, despite their importance for avoiding negative impacts on bats. To address this gap, the Advisory Committee (its IWG on conservation of key underground sites)   developed and circulated an online questionnaire to Parties and non-Party Range States to gather evidence-based information on conservation measures at important underground sites for bats. These measures include both direct interventions (such as grilles, gates and fences) and indirect measures (such as warning boards and CCTV systems). 

The questionnaire was designed to capture both successful practices and those that proved ineffective or had unintended negative consequences. To date, more than 50 examples from 15 countries have been collected, demonstrating strong engagement across the range while also highlighting the need for continued outreach and data collection.