Photo of the Week – December 3, 2010

A dragonfly in the early morning - Pawnee County, Nebraska

One of the great things about close-up photography is that you don’t have to travel very far to find subject matter.  This photo was taken in the backyard of a house near Steinauer, Nebraska.  We had rented the house for some graduate students to use as part of a research project in southeastern Nebraska.  I was visiting the students to help set up some vegetation survey work, and found this dragonfly while I was waiting for everyone else to finish breakfast.

The morning was ideal for close-up photographs.  The sun was just coming up, and there were diffuse clouds along the horizon that kept some of the intensity out of the light but didn’t remove the warm color.  Most importantly, there was almost no wind.  I was walking along the yard, following a fenceline between the yard and an adjacent pasture – looking for anything interesting.  There was a small depression filled with wetland vegetation just inside the fenceline, and I found several dragonflies perched there, waiting for the day to warm up.  Despite the cool morning, a couple of them managed to rouse themselves and fly off as I approached them.  This one, fortunately, was not worried about me or my tripod (or was too cold to care) and the sun was just starting to hit it.  I was able to swing my tripod around so that the yard was behind the dragonfly – simplifying the background – and took a series of photos as I crept ever closer to it.  This was the last one I took before I backed away and left the dragonfly in peace.

Ambush in the Prairie

Like crocodiles in African water holes, crab spiders sit patiently on prairie flowers, waiting for prey they know will eventually come.  For crab spiders, that prey is most often an unwary pollinator looking for nectar.

A crab spider with a recently caught orange sulphur butterfly. The Nature Conservancy's Platte River Prairies.

Crab spiders are not built for speed and they have poor eyesight – even for a spider.  However, they’re well built for ambush.  Both sets of front legs are extra long, and the spider snaps them shut to catch any insect that happens to come within reach.  In addition to those legs – and a good dose of patience – some species of crab spiders can also change their color to better camouflage themselves.  They’re not quite on the level of chameleons, but over a day or so, those species can change from white to yellow – or vice versa – to match the color of the flower they’re on.

Read more about crab spiders in my NEBRASKAland magazine article here: CrabSpider-July2009 and about spiders in general in another article here:Spiders-AugSept2010.