posted by Catherine on May 13
There is a very unusual evening event taking place across the UK – but are you too squeamish?
This event focuses on those sometimes scary and often unwanted nighttime moths – but if you read more about them, you will find that they have much to offer your garden and the environment. And you may even get to like them after this!
The event has been running since 1999, and takes place on a date where the conditions should be best for moths to be out hunting. This year is falls on the night of May 15th – and there are events all over the country that you could become a part of.
The Event:
Run by the Butterfly Conservation Trust (BCT), this annual event allows you experience the world of moths when they are at their best, and to help the trust to identify species distribution and any new arrivals in the country – for example in 2008 a species was found in Ireland that hadn’t been seen in the UK ever before!
However 62 moth species became extinct in Britain during the 20th century – so it’s not always good news!
This year though, is the first time that the BCT are teaming up with the Bat Conservation Trust (confusingly also the BCT – so BatCT for this article). As bats are also found hunting at night (mainly the moths you are trying to record!), it seemed the best use of resources to get the people who were already out at dusk counting moths to record and bat activity they saw at the same time.
This extends the nighttime adventures you could have! Whether you are aiming to just watch from inside you home at the creatures who fly up to your lights, whether you want to head out into the woods and set overnight (live) traps or whether you want to join a group bat watch and get to use their specialised equipment to hear their communications. It’s up to you!
There are 16 species of bat to be found in Britain – and they all feed on moths!
Habitat Change:
However, as the bats feed on the moths and other insects, they are just as much at threat to land use changes. This includes your gardens and local parks and woodlands.
If plants are cleared for driveways and decking replaces grass, there is less food for the insects and less nesting sites for their young – like caterpillars. Caterpillars need to eat plants when they are growing – and they eat a lot, so rather than only having delightfully ornamental plants in your garden for your own pleasure – make sure there are some local plants still around that they can use to grow and breed.
That way, when they start to eat through young plants, you won’t be tempted to use chemical to keep them away. And their prefered plants are often fast-growing native plants that can be planted away from your favourites!
The same goes for ponds and other waterways. Bats are commonly associated with water as well, as many insects lay their eggs in or around water and as they hatch – along come the bats for a feast!
Counting Them:
Take a look at the event website for details on local events or how to make your observations count – and how to download your photos of the event.
You don’t need to buy any special equipment to take part – unless you are very enthusiastic – but there are some easy home-made ways to trap moths of all sizes. And some are truly beautiful to look at – not all of them are brown or grey! Take the Elephant Hawk Moth – it’s pink and lime green and a good size!
There are obviously many tips on how to make the night a success – and you never know, you may well find a new species along the way!


