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Bug News

Observations, factoids, funny clips, and lots of bugs and other nature related images.

6-Minute Read

Remember all those boldly colored reddish-orange and black bugs that were all over the place in the fall? Hanging out in huge clusters? Well, theeey’rrre back! That is if they ever left you in the first place… And now they’re multiplying! Literally, lol.

If your house is at all like mine, there are always a ton of bugs that are quick to take advantage of the warmth and shelter of something they didn’t build themselves. I mean why not? I’d love to have a free heated house to spend the winter in, wouldn’t you? Ladybugs, leaf-footed bugs, stink bugs, spiders, and of course the Boxelder Bug (today’s focus), are all frequent house squatters. The difference is that now, instead of trying to get into the house (like they were in the fall), any that were hiding inside over the winter are now trying to get outside. And in a hurry too! Why? Because it’s time to find a mate and make lots of little Boxelder Bugs!

Caught in the act - Boxelder Bugs mating

Caught in the act - Boxelder Bugs mating

Despite often being a nuisance, the Eastern Boxelder Bug, Boisea trivittata (family= Rhopalidae), generally causes little to no plant damage (in most cases) and is harmless to people and pets. They will stain your fabrics though if you accidentally smash them in the curtains or couch though, so try not to do that… Also sometimes called Maple Bugs or Politician Bugs, the Boxelder Bug is native to southwestern North America and primarily feeds on the seeds of boxelder trees (hence the common name), as well as the seeds of other maple, ash, and soapberry trees. This means Boxelder Bugs can be found pretty much everywhere there are boxelder, maple, soapberry, or ash trees - all the way from Canada down to Chile. While not considered invasive in the US, they are considered an invasive species in Chile and were just recently documented there for the first time in 2020.

Large group of Boxelder Bugs congregating by my door

Large group of Boxelder Bugs congregating by my door

But back to baby making. Female Boxelder Bugs excrete an odor when they are ready to mate and the males use their antennae to find the females. Once they find each other, they join rear ends to proceed with the mating process. To try and keep from becoming some larger critter’s snack, the female quickly scurries from hiding place to hiding place – dragging the male with her until mating is complete! As you can see in the video below, they can move really fast in this most awkward position!

Video of Boxelder Bugs mating…

Once mating is complete, the female can lay 200-300 eggs - pretty much anywhere there is a slight bit of protection. On host trees, on top of soil, in leaf litter, grass, bark nooks and crannies, and lay them all together or split the eggs into multiple small clusters and lay them on all of the above. Clearly not the pickiest of mothers, lol. Adults usually live for about a year, but only for 10-21 days after mating. Females can mate multiple times in one breeding season and there can be one or two different generations every year (sometimes three depending on where you live), one in the spring and one in the fall.

Boxelder Bugs mating while making an awkward turn-around..

Boxelder Bugs mating while making an awkward turn-around..

Baby Boxelder Bugs are called nymphs and basically look just like the adults, except shorter and they haven’t grown out their wings yet. This leaves their bright reddish butt exposed until their wings fully develop. Boxelder nymphs feed throughout the summer and it usually takes about 60 days for the babies to become adults, depending on food availability. Once fully mature, the adults look for mates to start the circle of life all over again. Or if they finish maturing right before winter, they will wait with mating and look for a place to overwinter. Likely trying to sneak into your house again for the free warmth and shelter… There’s enough room for everyone, right?

Boxelder Bug nymphs & adults on hosta plant

Boxelder Bug nymphs & adults on hosta plant

Read more about the Boxelder Bug here:

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Written by an entomologist for the enjoyment of all... The goal is to post 1 new story every week or so. Stay tuned!