Photo of the Week – October 3, 2013

I found this robber fly perched in the prairie early Monday morning.  Although it was fairly breezy, the light was good enough to attempt a photo.  I’m glad I decided to give it a try.

Robber fly.  The Nature Conservancy's Platte River Prairies, Nebraska.

Robber fly. The Nature Conservancy’s Platte River Prairies, Nebraska.  You can always click photos to see a sharper version.

Ten years ago, I wouldn’t have even considered attempting this photo.  When I was shooting with slow speed slide film, I loved the saturated color of Fuji Velvia, but every time I clicked the shutter it cost me about 34 cents in film/processing.  That kind of cost made me pretty leery of trying to photograph something like a flower that was blowing around in the wind.  A shot that came back blurry because the subject was moving too fast cost me just as much as a nice sharp image, so I couldn’t afford to “miss” very many times.  I would often take 3-4 versions of the same shot to make sure I got the exposure and focus correct, but even that was costing me about a dollar per good image.

This week, I photographed the above robber fly for about 5 minutes.  Within that time, I took 162 images.  The vast majority of those were blurry because the wind was swinging the fly and its perch so much I couldn’t focus and shoot fast enough to keep up.  I ended up with only a few sharp images in three different compositions.  Ten years ago, taking 162 photos would have meant about four and a half rolls of slide film and would have cost me about $44.  This week, it just meant I had to sort through 162 images to find the good ones – something that took just a few minutes.

Digital photography can sometimes make me a little lazy because it’s tempting to let some of the fundamentals of exposure and composition slide and try to fix things later with digital processing and cropping (though I usually don’t do much of that, and there’s still no substitute for getting it right in the field).  On the other hand, digital photography allows me to take risks that would have been unthinkable (or at least really expensive) in the old days.  Blurry photos don’t cost a thing now, and can often be deleted in the field.  Just as important, I can make sure I’ve got the shot I want before I leave, instead of discovering it days later when my slides come back from being processed.  Overall, it’s a pretty good time to be a photographer.

Just for fun, here are some of the other images from the brief photo session with the robber fly.

This one ended up relatively sharp...

This one ended up relatively sharp…

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...but I had 30 more that looked like this.

…but I had 30 more that looked like this.

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This one (like many others) was pretty fuzzy...

This one (like many others) was pretty fuzzy…

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...but this one isn't too bad.

…but this one isn’t too bad.

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Photo of the Week – December 1, 2011

The diversity of insect species in prairies – and other ecosystems – is simply mind boggling.  One of my favorite activities with kids is to hand them an insect sweep net and let them find out for themselves just how many different kinds of “bugs” there are in a prairie.  There’s a lot more than just grasshoppers out there…

I also like to quote impressive insect statistics when I give presentations, and one of my favorites comes from a 2000 report by Richard Redak.  Do you know which group of insects has the most species in North America? (The group includes 37% of all insect species on the continent.)  I’ll make it multiple choice, and you can choose from the following:

a) beetles

b) flies

c) wasps/bees/ants

d) butterflies/moths

e) true bugs

Made your guess?  Ok, scroll down to see if you’re right.

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A flower fly (Syrphidae) on yellow/hairy stargrass (Hypoxis hirsuta) along the Platte River in Nebraska.

Surprisingly – to me, anyway – the answer is Flies (the order Diptera).  Would you have guessed that there are more than 36,000 species of flies in North America?  That means that one in three insect species in North America is a fly.  How many species of fly can you name??  Three? (house fly, horse fly, …uh….)  No, butterfly and dragonfly don’t count.

I think it’s fantastic that there are 36,000 variations on those noisy flies that buzz around my head.  Because I’ve been paying attention to pollinators recently, I know that there are many kinds of flies that are valuable pollinators – in fact, flies are second only to bees in terms of effectiveness and importance.  As a photographer, I see a lot of flies hanging around flowers and elsewhere, and I’ve got quite a few fly photos that do look fairly different from each other.  But I still wouldn’t have guessed there were that many kinds.

A robber fly photographed along the Platte River in Nebraska. I love the eyes and claws, especially. ...Just another one of the 36,000 species out there.

Why is it important to have 36,000 kinds of flies?  I’m not sure, but isn’t it great to know they’re out there?  We could discuss the diversity of the ecological roles that flies fill – and they ARE important in many ways – but for me, those things are secondary to the simple fact that they exist.  We live in a great world.

By the way, if you guessed beetles on the quiz above, it’s a great guess – and you’d have been right if the question was about the entire earth.  The tropics have astounding numbers of beetle species, and that pushes them above flies.  But in North America it really is flies.