Posts Tagged ‘Gray Petaltail eyes’

Gray Petaltail dragonflies (Tachopteryx thoreyi) are one of the friendliest and tamest dragonfly species that I have encountered. If you hang around with them often enough, they are almost certain to land on you, particularly if you are wearing gray clothing that somehow reminds them of a tree. It is a little hard not to flinch when one of these relatively large dragonflies (3 inches (75 mm) in length) perches on your head or shoulder.

Gray Petaltails will also let you get pretty close to them when they are perched on trees. Quite frequently, though, they are perched above eye level, so being that close does not allow you to capture close-up images. This past Saturday when I was hunting for dragonflies with my friend Walter Sanford, we spotted a Gray Petaltail perched on a fallen branch that was at knee level. After we had both taken some shots, Walter challenged me to see how close I could get to the dragonfly to capture images with my macro lens.

The first shot shows one of my attempts to get a head-on shot. It is very cool to look another creature straight in the eyes, but it is rare that one will permit you to do so, especially at such close range. It seemed clear to me that the dragonfly was quite aware of my presence, but did not consider me to be a threat.

I took the second shot from the side as I moved even closer to my subject. I was trying my best to capture some of the details of the dragonfly’s eye that was nearest to me and was not concerned that most of the rest of its head was out of focus. If you double-click on the image, you can see some of the ommatidia, the individual optical units that make up a dragonfly’s amazing multi-faceted compound eyes.

If you want to learn more about dragonfly eyes, check out a wonderful article at medium.com entitled  “30,000 Facets Give Dragonflies A Different Perspective: The Big Compound Eye In The Sky“. Scientists, for example, know that the thousands of ommatidia produce a mosaic of “pictures,” but how exactly this visual mosaic is integrated in the insect brain is still not known.

Gray Petaltail

Gray Petaltail

© Michael Q. Powell. All rights reserved.

Read Full Post »