Photo caption: A legion (hah, get it  – not army, but part thereof!) of sugar ants committed mass suicide in my bottle of honey. In honour of those that might resurrect – I can see some of them will – I pooled it in the sink and gave them a chance to extract themselves (sugar ants are resilient to injury). A few less foolhardy brothers and sisters are supping from the edges.

People don’t know what to make of the teeny-tiny ants that march indoors like school children on spring and summer days (when they should be outside!). They can’t be mistaken for carpenter ants. But, like the many other species that aren’t carpenter ants, all searches end up on results about killing them. As if they were as dangerous as carpenter ants. Carpenter ants won’t hurt you, but their infestations are dangerous to your house – they devour wood.  

Common talk, mass media, and the extermination industry has effectively enabled people to think that insects are disgusting and undesirable. We know this is just flat-out wrongheadedness. All it takes to realize that bugs aren’t your enemy is to observe them objectively, and if that isn’t enough, it always helps to do a little research.

Of course, when you try to do some research, you have to get past the “get rid of” them websites. The truth takes lot more digging. So that’s what this blog post is about.

Tapinoma sessile is the name of this kind of ant. Here’s the path I took:

  1. Visiting WikiHow’s excellent self-education article “How to Identify Ants.” I learned a lot about ant anatomy here! For example, their third section, the abdomen, is called the gaster. You should note what colour it is when identifying the type of ant.
  2. From there, I discovered Ant Web, which is like a species atlas. It’s obviously meant for researchers but it’s quite the remarkable resource. Did you know the ant family is called Formidaceae?
  3. This is also how I found the Discover Life website, but I quickly became overwhelmed and bounced. I may bounce back when I research my next plant or animal.
  4. Visiting one of the many “get rid of them” extermination websites, where at least they will tell you some facts about the species. This page helps you determine which common ant you might have.
  5. And finally, AntWiki! When you start with the species name of the ant, it’s easy to get to the real resources on all things about ants or any other living being.
  6. As a bonus, there’s Texas A&M’s AgriLife Extension website, Insects in the City. The focus may be on Texas, but it has a lot of information and they’re definitely on board the biophilia train. The next quote comes from them:

[Tapinoma sessile] are attracted to sweets.  Odorous house ants most commonly nest outdoors, but will also nest in bricks and wall voids and other interior locations.

Identifying household ants, accessed May 27, 2019

OK – so, if you’re having a sudden influx of sugar ants, your job then is to find out how they’re getting into your house. I know in my case, it’s through the patio door, but if you have any gaps and cracks in your house, consider the sugar ants a symptom, and sealing the gaps and cracks a cure… for energy efficiency.

Animal and insect populations go through boom and bust cycles, and when sugar ants first made their appearance in my kitchen in June of 2010, I’d never really noticed them before, but suddenly it seemed everyone was noticing them. Killing them was never my thought. Yes, there were many of them, but I was curious: why are they here?

My answer, relevant to me: I left the maple syrup out on the counter, and they were attracted by the sugar in the ring mark from the bottle. Once they ate all the sugar, they marched off to look for something else sugary.

Indeed it seems that sugar has been an evolutionary key to colony immunity from infectious disease. As ants are eusocial – always in cooperative groups – this would be a serious benefit.

NPR did a special on sugar ants in “The Tiny Ant that’s Taking Over the Big City.” The comments for the article are illuminating of this ant’s background and context in the American city.  Sugar ants are able to create supercolonies that they could not sustain if they were in the forest. However, for all the preventions and solutions the article, including its sidebar “Keeping Ants Away,” I failed to see a compelling argument why.

Maybe it’s just sheer numbers, but I don’t consider 10, 15, 25, or even 50 ants smaller than a grain of rice to be a problem in my kitchen. Why should I begrudge them eating what I cannot? If I saw more, I’d now that I’m the problem, leaving too much food around.

I was reluctant to wipe up the counter here

For one example, they got into a tray of dates that I had left out. The dates were gooey, leaving a syrupy residue in the tray. As soon as I picked up the tray, exodus!

I tapped the tray on the counter a few times. Even those snacking on the cracks in the date skins pulled themselves away and fled. All of them. Back down the kitchen cabinet, and out the patio door. I encouraged this with a gentle brushing with the dustpan, same as I do for any other insect or spider.

So I made a bargain with the ants: I’m taking all the dates, but you can have the tray. I washed all the dates off in hot water and put them in the fridge. I put the tray out for the ants to eat in peace. They were completely done with it about two days later.

Observing sugar ants with household and garden plants

I had an umbrella plant –  I don’t know what kind – for a long time. With the onset of spring, I put it out on the deck for its own good. It immediately produced new branches and leaves, and I noticed how the sugar ants laid eggs right at the junction on the underside of the growing terminal leaf, with several “nurses” remaining with the small clutches. They look like they are aphid farming. Yet the plant wasn’t damaged in any way.

But, just when the plant was in reach of the balcony rails, along came my rabbits and ate a few of these terminal leaves, annihilating the sugar ant eggs and their nurses in a few quick nibbles. The poor plant had to regroup and send out new terminal buds, to which the ants responded again.

The attacked plant with the new growth seemed little worse for wear. It kept growing with no scar tissue from this “infestation.” Could this be a symbiotic relationship?

In 2007,  Mathews et al published a paper titled EFNs Enhance Biological Control of G. molesta (Environmental Entomology 36(2)) about the sugar secreted by peach tree leaves and how, if ants have access to the canopies of the trees, they competitively exclude (or predate upon) oriental fruit moths. They then become a biological pest control agent.

The moral of the story is, though this isn’t the same plant, and it isn’t the same ant, the view of “pest” needs to be more rigorously applied: are those sugar ants doing you any harm? Could they been seen as helpful?

For me, no harm, and they help keep my counter clean. While I’m not creating an ant farm here, I observe a little more household cleanliness than most people. It seems, perhaps, that sugar ants going about their business is an overall good.

Keep your food out their way, keep generally clean, and don’t begrudge the seasonality of these visitations. They’ll come and go. In 2019, I haven’t seen any yet.