The Wildlife Trust has reminded people to clean out their bird boxes during autumn to stop the spread of bacteria and make sure they are safe for birds looking for shelter during winter.

Nestboxes provide a safe and warm habitat for garden birds to feed and raise their young in private – but if they aren't cleaned properly, they can harbour nasty parasites and pose a risk to the animals inside.

A well-designed nestbox will only need cleaning once a year, in the autumn, but it's vital it is done correctly to prepare for the arrival of new birds in need of winter refuge.

How to clean a nestbox

After the end of each nesting season, remove the nesting materials inside the nestbox and clean well to kill any parasites.

Follow these simple cleaning steps:

  1. Before you begin, it's advised you wear surgical gloves and a dust mask
  2. Before you remove the box, keep an eye open for any small birds that could still be hiding inside
  3. You may find flees, ticks and lice when cleaning out the box, so put these straight into a bag and seal it tightly before disposal
  4. Use a small brush to remove any debris from the corners
  5. Use boiling water to sterilise the inside
  6. Let the box dry out before placing the lid back on
  7. Remember to avoid using insecticides or flea powders

If you don't clean out your nestbox properly, it could become filled with old nesting material. This could result in the nest being closer to the entrance hole, meaning that predators could easily reach the small birds inside. Cleaning also stops the spread of diseases.

House wren feeds bug to babies in birdhousepinterest
northforklight//Getty Images

How often should you clean your nestbox?

The RSPB recommends cleaning your nestbox in the autumn, from September onwards, once the birds have stopped using the box. Before you remove the box, keep an eye open for any small birds that could still be hiding inside.

According to the Wildlife Trusts, under the terms of the Wildlife and Countryside Act 1981, if unhatched eggs are found in the box, they can only legally be removed from October to January, and they must be destroyed – it is illegal to keep them.

We earn a commission for products purchased through some links in this article.

15 bird feeders to buy right now

Like this article? Sign up to our newsletter to get more articles like this delivered straight to your inbox.

SIGN UP

Headshot of Lisa Joyner
Lisa Joyner
Deputy Daily Editor, Country Living and House Beautiful

 Lisa Joyner is the Deputy Daily Editor at House Beautiful UK and Country Living UK, where she's busy writing about home and interiors, gardening, dog breeds, pets, health and wellbeing, countryside news, small space inspiration, and the hottest properties on the market. Previously, she has written for Conde Nast Traveller, House & Garden and Marie Claire magazine. Lisa studied at University For The Creative Arts, where she completed a BA in Fashion Journalism.