Photo of the Week – August 31, 2012

It seems like a good time to be a crab spider.  The drought has greatly reduced the number of flowers blooming in prairies, forcing pollinators to visit fewer flowers in greater numbers.  Previously, I’ve used the analogy of crocodiles in watering holes to describe crab spiders waiting in ambush on flowers.  To further that analogy, the drought has now dried up all but a few watering holes, and the crocs just have to sit and wait for the increasingly desperate animals to come to water.

A crab spider with the spotted cucumber beetle it just captured.

When I was photographing for my drought post earlier this week, I found this crab spider, which had just captured a spotted cucumber beetle.  The beetle was still struggling against the spider, but the spider was maintaining a tight grip on its head.  I didn’t stick around for the ending, but it assuredly didn’t end well for the beetle. 

If you’re a gardener who has dealt with these beetles on your cucumbers, melons, or other produce, you’re likely not shedding any tears over this photo.  Not only do cucumber beetles feed on the leaves and fruits of garden vegetables, they are also a carrier for bacterial wilt, which can also cause lots of damage.  However, unlike some garden pests, cucumber beetles are native insects who just happen to have found easy pickings in cultivated areas. 

Cucumber beetles are a very common sight on prairie flowers right now.  They are feeding on the pollen, but like most beetles provide very little actual pollination for most of those flowers.  While they’re not pests to the degree they are in gardens, these insects aren’t really doing those flowers much good either.  

On the other hand, they’re providing a good food source for crab spiders!

A Soldier Beetle Occupation

Everywhere I look, I see soldier beetles.

They’re in my yard, they’re in my prairies, and now I think they’re getting into my head (figuratively speaking).  The linden tree in our front yard is blooming this week, and every flower is loaded with feeding and mating soldier beetles.  Over the weekend, my son and I went to our family’s prairie and it seemed there were soldier beetles on every plant! 

While soldier beetles are predators, they also feed heavily on pollen.  This one is feeding on sensitive briar – aka cat’s claw (Mimosa quadrivalvus) at our family prairie in Hamilton County, Nebraska.

Daniel and I were at the prairie to look for musk thistles (only found one) and check the cows (found them all).  After we accomplished those two objectives, I grabbed my camera to take advantage of the diffused light from the bright overcast skies and Daniel headed to the pond to chase frogs.  Dan didn’t catch any frogs, but I managed to get some decent shots.  Some of those photos included soldier beetles as the primary subject – they were easy to find.  Other photos included soldier beetles accidentally.  In a few cases, I didn’t even know the beetles were in the photo until I loaded the images onto the computer back at home.

While they are sometimes misidentified as lightning bugs, these are soldier beetles feeding on the pollen of a black-eyed Susan flower.  I photographed these on purpose…

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When I photographed this fly feeding on a daisy fleabane flower, I didn’t even see the soldier beetle in the background – though I shouldn’t be surprised it was there…

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These regal fritillary butterflies are out very early this year, and are fortunate that milkweed flowers are also out early. I was photographing the butterflies (including the variegated fritillary), but ended up with soldier beetles in the photo as well.

When I zoom in on the butterfly photo above, I can count five soldier beetles. Can you find them all?  One is particularly tricky to find because only the back half shows.  I think I see the leg of another, but I can’t tell for sure.  If you click on the photo and then click again, you’ll get a zoomed in image (if your computer works like mine).

If you want to learn more about soldier beetles – including how to differentiate them from lightning bugs – click here.

I wonder if they’ll chase away the moths…