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Bat boxes and night flowers: How to attract bats to your garden this Halloween

There are 53 species of bat in Europe - but they are under increasing threat.
There are 53 species of bat in Europe - but they are under increasing threat.   -   Copyright  Ark Wildlife   -  
By Charlotte Elton

It’s time to bust out the Halloween decorations. But why waste your time with plastic ghosts and ghouls when you could attract real bats to your garden?

Building a bat box is a great way to get into the Halloween spirit - and also to protect an endangered species, says wildlife expert Sean McMenemy.

“Bats are mammals like us and have a long association with humans, frequently living alongside us in our houses and outbuildings,” he explains.

“Like humans, they only have one baby a year (or sometimes even less) and so every life is precious.

“The loss of any habitat can take many years or even decades to recover due to their slow breeding rate.”

Are bats endangered?

The International Union for the Conservation of Nature (IUCN) lists 40 per cent of all bat species as either Threatened with imminent extinction, Near Threatened or Data Deficient.

Habitat loss, construction work, and cat attacks are among the greatest threats bats face.

Declining insect numbers - brought about by the increased use of pesticides and global warming - also pose an existential threat, as increasing numbers of bats go hungry.

In Europe, there are 53 species of bats, which make up 20 per cent of all indigenous mammal species.

How to attract bats to your garden this Halloween

Bats are a great addition to the garden, McMenemy says.

“Bats are not rodents and therefore do not chew wood, wiring or any other material,” he explains.

“Being a natural bug deterrent and harmless in the home, bats should be welcome in every garden. In fact, without the ability to share our accommodation, many species would become extinct!”

The creatures are nocturnal insectivores and fly around consuming huge numbers of night-flying insects including biting gnats, mosquitoes and moths.

One way of attracting bats is by inviting moths to your garden by planting night-scented flowers. These include:

  • Evening primrose
  • Honeysuckle
  • Tobacco plant
  • Night phlox
  • Star jasmine
  • Sweet rocket
  • Night scented stock

Careful planting is key to giving bats a safe haven

“Bats use echo location, rather than sight, to navigate, sending out high pitched sounds and listening to the returning echoes,” Ark Wildlife advises.

“Certain garden features such as walls, fences and hedges all create useful navigation routes for bats to use while hunting.

“Imagining navigating your own garden by echo location will help you work out the best areas to plant for bats.”

How to build a bat box

Canva
Bat boxes are a great way to entice bats to your garden.Canva

Another great way to welcome bats to your garden is to install a bat box.

To hibernate, bats seek out discreet crannies where they are safe from predators, and can stay warm and dry through winter. Wooden bat boxes provide the traditionally spooky creatures with a safe place to roost and raise their pups.

The little houses look like a bird nest box, with a narrow slit on the underside rather than a hole in the front.

You can buy a batbox from McMenemy’s Ark Wildlife, or download a diagram and assemble your own.

Here are McMenemy’s top tips on bat boxes:

  1. Bats are sensitive to smell and temperature, so place the bat box in a sunny area of your garden and only use thick untreated timber in construction.
  2. Use rough-sawn timber (not planed or smooth) as bats need a rough surface for their claws to grasp.
  3. The back plate should extend 10cm lower than the box itself, creating a ‘landing pad’ from which the bats can crawl up and into the box.
  4. Above the landing pad, leave a small gap in the base of the box - less than 1cm between the back plate and box.
  5. Make sure all other joints are sealed to keep the interior of the box dark, dry, and draft-free.
  6. A good idea is to extend the back plate top and bottom as this make it easy to fix in place.

Don’t be afraid to install more than one bat box. Bats use different roosts throughout the year, changing locations depending on weather and breeding, so they’ll appreciate more than one home.