When I mentioned to my son I was setting up a moth trap, he thought I meant in my clothes wardrobe upstairs. I did once have my best suit nibbled into holes by moth larvae. No, I’ve borrowed a light trap to use in the garden for a few days. I remember back in lockdown trying to attract moths onto a syrup trap on a tree in the garden – it was a complete failure. Let’s hope for better success this time.

I’m a complete amateur when it comes to Lepidoptera – butterflies and moths. We are used to seeing butterflies in the daytime, and even I am able to identify numerous common species. But moths are more mysterious, being mainly nocturnal and thus going unnoticed by most of us.

The trap is a basic box with two perspex sheets forming a V with a slot at the bottom for the moths to fall through. At the top is a powerful fluorescent tube to attract the moths in the first place. The egg boxes give the moths nooks and crannies to hide in.

The first night, I place the box in my garden at the edge of my uncut lawn.

The big switch on.

Quite a few moths escape when I open the box at 5 am (I’m a poor sleeper) to release the bat that got in there. The bat is not identified. Somewhat later, after coffee, I come out to examine the night’s trappings.  The majority of the twenty or so moths hiding in there are Underwings, drab-looking specimens. The flash of the underwing is only visible as they fly off.

I think this is a Large Yellow Underwing.

I may identify another five species, but I realise how difficult it is going to be. Here is a Garden Carpet.

And I think this is a Dusky Thorn.

The identification book I’m using is the Bloomsbury Wildlife  – Concise Guide to Moths of Great Britain and Ireland. Very clear pictures, but so many to trawl through when one is not used to the subdivisions.

It is unwise to use the trap on consecutive nights in small gardens as it could interfere with the moths’ feeding habits. They are not getting much nectar or sap at the bottom of one of these traps. A couple of nights later, I reset the trap in a different part of the garden, away from the house, hopefully to avoid catching a bat, which encircle at dusk.  The next morning I have a bumper batch of moths, about thirty. I can’t stop some of the larger and possibly more interesting ones from flying off. Again, there are dozens of Underwings.

A Copper Underwing.

I definitely identify a few other species this time. My phone photographs are mostly too blurry as I struggle one-handed, whilst the other hand upturns and inspects the egg boxes.

 

This is a steep learning curve. There are over 1600 British micro-moth species, compared to around 800 species of macro-moth and 60 species of butterfly, so species identification is particularly challenging. 

I try one more night, again in a different area. The last two nights were warm and calm, whilst this night is cooler with a breeze. I wonder if that will deter the moths. No, this morning, when I examine the trap, there are forty-plus moths inside.

The ubiquitous Underwings and lots of smaller moths, which I try my best to identify. There is a tatty-looking Poplar Hawk Moth, which I hope hasn’t come to grief in the trap.

 

 

 

So I have probably only identified less than half of the moths that have been attracted into the trap, but it has been great fun. I need to hand it back before I become addicted.