Yesterday, I seemed to be particularly fascinated by insect eyes and did a posting on a fly, whose compound eyes were pretty amazing. However, dragonflies have the largest compound eyes of any insect and I was thrilled to be able to capture this face-to-face shot of a Common Whitetail dragonfly (Plathemis lydia), peering right at me over the edge of a leaf.
A dragonfly’s eyes can have as many as 30,000 facets, known as ommatidia, that contain light-sensitive proteins, according to an article in ScienceBlogs. Although, humans also have these kind of proteins, called opsins, we have only three (red, green, and blue), whereas a dragonfly has four or five, giving it the capability to see colors beyond human visual capabilities. A dragonfly’s eyes also wrap around its head, giving it an incredible field of view. For more information and a more scientific explanation, check out a posting entitled “Super-predators” that Sue did last June in her Backyard Biology blog.
I took this shot in a wooded grassy area adjacent to a pond. It seems that the Common Whitetail dragonflies are hanging out there early in the season and not too many of them are patrolling over the water, as I commonly saw them do last summer. The fact that the dragonfly was not perched on a branch coming out of the water proved to and advantage as I was able to approach pretty closely to it in order to take this shot.

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