Bat droppings can look very similar to mouse droppings (dark and shaped like grains of rice) but they can be easily distinguished from rodent droppings by doing the ‘crumble test’

How to do the crumble test:

How to do the crumble test:

Roll a dropping in a piece of tissue, between your finger and thumb. If it crumbles under only a little pressure, it’s a bat dropping. Sometimes crushed bat droppings looks sparkly in the light.

Most commonly bat droppings accumulate underneath the roost, and below the points bats use to access their roost. In buildings, bat droppings might be found in the loft or close to the eaves.

All bats in the UK are insectivores, so their droppings are made up of dried insect remains. Generally there is nothing to worry about with bat droppings. In very rare situations some people can develop allergies, so we suggest you wash your hands after handling any droppings. If you need to clean up a large number of droppings then you might want to consider wearing a dust mask.

Buy our droppings identification guide

Buy our droppings identification guide

This handy guide is a fantastic identification tool for anyone wanting to identify bat droppings. It is small enough to fold up and keep in your pocket, wallet or purse!

The guide is double sided, with the back page giving detailed information about the size and texture of different droppings, as well as descriptions and guidance where they are most likely to be found.

If you are interested in the guide, you can request one by emailing us at We suggest making a donation of £2 + £1 postage to cover the costs by following the steps below:

Step 1 - donate by following one of the these options:

  • Use Paypal by looking for our email and using your full name as a reference (please fill out your address details too, so we know where to send the guide).


  • Send us a cheque in the post, please make this payable to the Bat Conservation Trust (you can find the address at the bottom of this web page). If you prefer to send us a cheque, you can include a stamped addressed envelope if you wish.

Step 2 – Email us at to let us know that you have posted a cheque or provide us with details of the reference you used with PayPal. We will then send the guide to you in the post as soon as we are able to.