On the same day that I saw the Common Whitetail dragonfly that I featured yesterday in my blog posting, I was thrilled to have the chance to photograph an uncommon dragonfly, a male Stream Cruiser (Didymops transversa). I had never before seen a Stream Cruiser, but local dragonfly expert and fellow photographer Walter Sanford had observed them in the past at Accotink Bay Wildlife Refuge and offered to guide me.
It’s somewhat of an understatement to say that Stream Cruisers are hard to spot. The are not very big (about 2.2 inches (56-60mm) in length), they are skittish, and they often perch on the stems of low vegetation. During the hours that we searched for them, I observed a couple of probable Stream Cruisers in the air, but lost them in the blur of the vegetation and never saw a single one land. Walter saw the first one of the day, a female, and posted an awesome photograph of the beautiful dragonfly in a blog posting yesterday. Unfortunately for me, I was unable to make it to the dragonfly’s location before she flew away. Walter spotted a few more Stream Cruisers during the day, but each time I couldn’t get there quickly enough to see one.
I was beginning to think that I was going to end up empty-handed for the day when Walter called out that he had spotted a male perched in the underbrush. This Stream Cruiser was cooperative enough to stay perched as I rushed to try to get a shot. I had my Tamron 180mm macro lens on my camera at that moment. The dragonfly and the stem on which it was perched were so small in the viewfinder that my camera’s autofocus would not lock on my subject, so I had to resort to focusing manually. Dragonflies have so many fine details that it is really hard to tell when they are in focus. This image was the best I could get after cropping the initial shot quite a bit.
I decided to push my luck and see if I could get a better shot with my Tamron 150-600mm lens that I use primarily to photograph birds. Amazingly the dragonfly stayed put while I changed lenses. Once again I had to focus manually, which is an even bigger problem with this lens, because the focus ring is located really close to the lens mount. It’s hard to hold the camera steady and focus manually at the same time.
Here’s an image that I shot at 600mm. I managed to get the eye pretty sharp and to capture some of the details of the dragonfly’s incredibly long legs, but the depth of field was so shallow that the abdomen is out of focus. Normally I will try to move around the subject to be as parallel as I can be, but in this case I stayed fixed at one spot and remained as immobile as I could.
It is really nice to start off this dragonfly season with a new species. If you want to learn more about the Stream Cruiser dragonfly, check out this page from the Dragonflies of Northern Virginia website (and stay tuned for Walter’s shots of this dragonfly that should appear tomorrow morning in his blog).
© Michael Q. Powell. All rights reserved.
Read Full Post »
Mike Powell 