Roost Features

An account of how Potential Roost Features (PRF) form, why they form, where they form, why they form where they form, and approximately how long they can be predicted to last;


An account of how bat species native to the British Isles use trees

Dichotomous Key

A dichotomous key to potential bat-roosts in trees for use in the formation of a hypothesis used to guide further survey effort, and also an interpretive tool to give a hypothesis of what might have been present, where conclusive evidence has eluded survey.

Welcome to the Bat Tree Habitat Key project website.

Please note that as of 17th April 2023 Henry Andrews has very generously handed over the ongoing management of the Bat Tree Habitat Key Project to the Bat Conservation Trust. You will see a new email address ( on the recording form which reflects this change. We will be announcing the handover and making changes to the website in due course.

The Bat Conservation Trust would like to thank Henry for all of his hard work and expertise in developing this project and for the contribution it has made to bat conservation. We look forward to working with users of the project and further developing it in the future.

This website holds: –

  1. The four project objectives and their accompanying definitions of success;
  2. An online database of all records thus far collected by the project, and submitted by third-party contributors;
  3. A facility for the submission of records;
  4. A link to the publisher of Bat Roosts in Trees –¬†A Guide to Identification and Assessment for Tree-Care and Ecology Professionals;
  5. The literature review;
  6. A reference library of free resources and
  7. A contact via which interested parties may submit inquiries.