An all-Ireland charity that promotes the conservation of bats and their habitats

Bat Conservation Ireland

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  • Our Work
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You are here: Home / What We Do / Monitoring and Distribution Projects / Brown Long-eared Bat Roost Monitoring

Brown Long-eared Bat Roost Monitoring

 

Photo credit: Karen Healy

The annual population trend of the brown long-eared bat is assessed every year by counts at a sample of roost sites across the Republic of Ireland. Over 40 sites are counted twice between May and August. In order to derive reliable trends the same sites are counted year after year.

A combination of bat group volunteers, roost owners and BCIreland staff carry out these counts.  Here is footage from a roost visit in 2024 using a thermal imaging camera (taken under NPWS Licence Karen Healy):

https://www.batconservationireland.org/wp-content/uploads/2024/07/ble.mp4

Since 2007 brown long-eared bat trends appear to be reasonably stable.

If you own a summer roost of brown long-eared bats and would like to become a volunteer for the survey please get in touch with us and we can discuss the survey method in more detail with you.

  • Monitoring and Distribution Projects
    • All Ireland Daubenton’s Bat Waterways Survey
    • Car-based Bat Monitoring
    • Brown Long-eared Bat Roost Monitoring
    • Lesser Horseshoe Bat Roost Monitoring
    • BATLAS 2020
    • Bat Record Maps
  • Children and Schools
  • Summer Bat Count
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Carmichael House,
4-7, North Brunswick Street,
Dublin 7
D07 RHA8

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Bat Conservation Ireland is a company limited by guarantee not having a share capital, registered in Dublin, Ireland.
Company registration number 494343. Charity Registration Number 20039417.

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