Photo of the Week – April 11, 2013

Sometimes, you can see a lot by just sitting down.

I carved out some time in the field last Friday to collect data on poison hemlock in our research plots.  After finishing that, I had about half an hour before I needed to head back to the office, so I took my camera for a walk along the creek running through our Platte River Prairies.  Not having a particular agenda, I stopped to look at a tree that had been recently felled by beavers.

This tree, cut down by our local beavers, had sap seeping from the stump last week.  The Nature Conservancy's Platte River Prairies, Nebraska.

This tree, cut down by our local beavers, had sap seeping from the stump last week. The Nature Conservancy’s Platte River Prairies, Nebraska.

As I was admiring the patterns of tooth marks on the stump, I noticed an interesting-looking little fly hanging around.  As I watched, the fly started to feed on the sap that was oozing out of the tree.  Taking advantage of the fact that the fly was distracted by its meal, I managed to get a couple photos of it.

This fly seemed to be enjoying its meal enough that it didn't mind me sticking my lens in its face.

This fly seemed to be enjoying its meal enough that it didn’t mind me sticking my lens in its face.

Since I had time, I decided to sit and watch the fly for a bit.  Before long, another – different – fly came along.

A second fly joins the meal.

A second fly joins the meal.

One of my favorite statistics is that there are more than 37,000 species of flies in North America.  That seems an almost unfathomable diversity.  Taking that into account, I guess I shouldn’t have been surprised to see a third kind of fly arrive at the stump…

Fly #3.  A big green one.

Fly #3. A big one with blue and green stripes on its abdomen.

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A rear view of fly #3, showing the striped abdomen.

A rear view of fly #3, showing the striped abdomen.

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A tiny wasp (2mm long).

A tiny chalcidoid wasp was on the stump as well, though not feeding on sap (thanks to Mike Arduser for identifying it for me – Mike says they are a group of parasitic and important wasps).  The quality of this image isn’t very good – my excuse is that the wasp was BARELY 2mm LONG and I had to crop it quite a bit so you could even see it…

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A tiny red mite came ambling along...

A tiny red mite came ambling along too…  It was about the same size as the little chalcidoid wasp

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Fly #3 didn't like Fly #1 working over the same puddle of sap and lunged at it

Fly #3 apparently didn’t like Fly #1 working over the same puddle of sap.  This photo captures Fly #1 rearing back as Fly #3 lunged at it.

I wish I’d had more time to stick around; it would have been fun to catalog all the little critters that visited – or were living in – that beaver stump.  I also wish I would have gotten a shot of the little wolf spider hiding in the pile of wood chips at the base of the stump – it darted out and almost caught one of the flies when it landed nearby, but didn’t stick around for a photo.  Too fast for me…

I think my short time watching the beaver stump brings up a number of interesting points that I could focus on as the overall theme of this blog post.  I could focus on the odd side benefits provided by the work beavers do.  I could focus on the crazy diversity of life found on a single tree stump.  I could focus on the way creatures of all different kinds are able to take advantage of unexpected resources (like oozing tree sap) when they appear.

But I think the biggest point is this:  You can see and learn an awful lot by just sitting down and watching.

Thank Goodness For Boxelder Bugs

Note:  When I wrote this post back in 2013, I had no idea so many people would find it while looking for information on these harmless little critters who often like to share our living space.  The many comments added to this post since then have been tremendous, heartwarming, and are worth reading.  I’ve also written a separate post with more information on boxelder bugs if you are someone looking for that.  Most importantly, please don’t let boxelder bugs frighten you.  They’re fascinating creatures and present no danger to you.  

I finally broke down and bought a close-up flash system for my camera.  Until now, I’ve just relied on natural light to illuminate the flowers, insects, and prairies I photograph.  However, during the last couple years, I’ve been weakening, and looking at recent images from people like Clay Bolt and Piotr Naskrecki finally pushed me over the edge.  After considerable wandering about in the world of internet photography websites and equipment reviews, I am now the owner of a Nikon R1 Wireless Close-up Speedlight Kit. (Say THAT five times fast!)

Here’s my next problem:  Now that I’ve got a flash system to help me get better close-up insect photos, where am I supposed to find an insect to photograph during the middle of February in Nebraska??

Enter the friendly neighborhood boxelder bug…

Boxelder bug - photographed in my kitchen.

A boxelder bug captured on my front porch and photographed in my kitchen.

I’m sure I’m not the only one who has been seeing boxelder bugs around their house this winter.  It seems there are always a couple of them nearby – soaking up some sun by the window or reading over my shoulder at my desk.  Sure enough, as soon as I got the new flash assembly hooked up and ready to test, I was able to find one boxelder bug in the kitchen and another out on the front porch.  (You can tell which is which in the photos because the bug from outside is covered in dust.)

The other boxelder bug - less dusty - that I found in my kitchen.

The other boxelder bug – less dusty – that I found in my kitchen.

Boxelder bugs are considered by many people to be pests, but that’s not a completely fair characterization.  Sure, they suck the juices out of leaves and the developing seeds of boxelder and maple trees, but they don’t siphon enough out to actually hurt the trees.  Yes, they can congregate in large numbers on the sunny sides of houses, but they’re not doing any actual damage there.  Also, while they are happy to spend the winter in cozy crevices around your house, they don’t eat anything during that time, and can make themselves available on short notice should you have the urge to try some wintertime insect photography in your kitchen.

As the photo shoot went on, the boxelder bugs and I got more creative in our portrait compositions.

As the photo shoot went on, the boxelder bugs and I got more creative in our portrait compositions.  (Also, this one didn’t want to hold still.)

The species of boxelder bug in my neighborhood is the Eastern Boxelder Bug (Boisea trivittata), which is found throughout most of the United States east of the Rocky Mountains, as well as in some western states, parts of southern Canada, and even Central America.  Boxelder bugs are “true bugs”, meaning they are members of the taxonomic order Hemiptera, along with other bugs such as stink bugs, plant bugs, cicadas, and many other insects that have piercing/sucking mouth parts.  Like many other true bugs, boxelder bugs also have a characteristic triangle between the tops of their wings (as opposed to beetles, in the order Coloeptera, which have hardened forewings that form a hard shell on their back when they’re not flying.)

They're even cuter from the front, aren't they?

They’re even cuter from the front, aren’t they?

One of the endearing qualities of boxelder bugs is that they can release bad-smelling/tasting chemicals to discourage predators.  Like many other insects with similar capabilities (monarch butterflies and long-horned milkweed beetles, for example), they have bright orange or red markings to warn predators off.  That defense mechanism may be why boxelder bugs feel comfortable hanging around – often in large crowds – in plain sight, while most other insects work hard to stay hidden.

Last shot.

Last shot.  Note the small eyes behind each of the main eyes.  Those smaller eyes are ocelli, or simple eyes, that (we think) can discriminate only between light and dark.  Their function is still a topic of debate among entomologists.

I understand that many of you won’t ever become fans of boxelder bugs.  I guess I can live with that, and – with the exception of those you squish – so can the boxelder bugs.  Personally, I like them.  As with every other insect species I know of, they have an fascinating life story, and they’re just trying to make their way through life like the rest of us.

Plus, they make very accomodating photo subjects in the dead of winter.

Photography notes for those of you who care…  These photos were all taken with the “standard” set-up of the R1 system, with two speedlight flashes, mounted at “9 and 3” at the front of my Nikon 105mm macro lens.  I had an 8mm extension tube on for all but the second photo shown here.  The bugs were photographed walking around on the white plastic (acrylic?) diffuser that came with the flash system.  All these shots were hand-held at 1/250 sec exposures.  I’m looking forward to using this flash system outside, so I can capture images of insects, flowers, and other small things when the available natural light isn’t quite as good as I might want.  We’ll see how that goes.