Somehow the words my high school Spanish and Latin teacher, Mr. Cretella, wrote in my yearbook have always stayed with me: “Never lose your desire to learn.” Indeed. That said, in Latin 1 during my senior year, if I couldn’t remember the answer, I substituted a Spanish term. I don’t remember how he reacted to that–probably with a groan on the outside and a smile within.
And so, my friends, please join me as I continue to learn about Odonatas, aka dragonflies and damselflies , those winged insects we all love to celebrate because they eat those that bug us the most, including blackflies and mosquitoes. Hmmmm, what about ticks?
Periodically, over the course of the summer my intention is to share some information and/or story with you about these predatory fliers. I may not always be correct, but hey, that’s how I learn, and I hope you’ll wondermyway for the journey.
One distinction I want to make is that mature dragonflies always have their wings spread out whether in flight or perching, while damselfly wings are together over their backs when perching (except for the Spreadwing family of damsels).
With 468 North American Species of Odonates at this time (new discoveries are always being made), Maine is home to 160 species.
One thing I want to point out about dragonflies is that the abdomen consists of ten segments. That will become important for identification purposes.
I thought we’d begin with the dragonflies known as Skimmers.
Skimmers, like the Four-Spotted Skimmer above, are the most ubiquitous dragonflies and range in size from small to large. They tend to have stocky bodies and spend much of their time perching on the ground and other flat substrates near muddy ponds and stream.
Chalk-fronted Corporal Skimmers are active May through July.
This chunky northern male skimmer has dark markings at the base of his otherwise clear wings. His hind wing patches are triangular, and the forewing patches are smaller or non-existent.
He has dark brown eyes and a black face. Notice the whitish/grayish/bluish stripes on his thorax–those are his “corporal” stripes.
The first half of abdomen is the same color and the rest of it is black.
Chalk-fronted Corporals tend to be in dense populations. Often, as I walk along a woodland path or beside a pond, these dragonflies lead the way, flying a few feet ahead, stopping on a rock or something else ahead of me and then as I approach, moving ahead again.
This baker’s dozen I spotted on a rock beside a small mountain pond.
The Female Chalk-fronted Corporal Skimmer’s eyes are brown and face tan. But where his thorax was whitish gray, her’s is brown.
Her abdomen, however, is like his.
Would you have guess that this was an immature form of the same? Just when you thought you nailed the Chalk-fronted Corporals. The immature features a lovely orangey brown with a black strip down the middle. The immature stage last for about two weeks in any species.
Active June through August, Slaty Blue Skimmers are about two in length.
The mature male is entirely blue except for black face and brown eyes. I typically find them flying and perching beside lakes and ponds.
Notice how he doesn’t have the patches at the base of his wings like the Corporals did.
Like most species, the female Slaty Blue has a look all her own with a brown thorax highlighted with yellowish-tan stripes. Her abdomen has a dark brown to black stripe down the top with a yellowish-tan stripe along the sides.
She’ll darken with age to a uniform brown or gray color and her eyes will become red-brown. Immature of both sexes resemble a young female, just to confuse you more.
Much smaller in size at about 1.2 inches as compared to a two-inch Slaty Blue are the Calico Pennants, active May through August.
The male has red heart-shaped spots on abdomen segments 4 to 7 (remember, all dragonflies have 10 abdominal segments so you need to start at the base below the thorax and begin counting from there.)
All four wings have a small dark patch at the wing tips. And the hindwings have a large, mottled dark patch at the base which reminds me of stained glass.
The stigma, on the leading edge of each wing toward the wingtip, and the face are red.
His claspers at the end of the abdomen are also reddish.
The female is the same as her male counterpart, but her spots and stigma are yellow. Again, it’s that stained glass effect that captures my attention.
From May through September you might spot an Eastern Pondhawk Skimmer near a lake or pond.
The entire thorax and abdomen of a Male Eastern Pondhawk Skimmer are powder blue; and his claspers at the tip of the abdomen are white.
Often found perching on lily pads, his face is green and eyes blue.
The female Eastern Pondhawk Skimmer is bright green with black markings. Her green thorax is unstriped.
In flight from May through August, the Dot-tailed Whiteface male is an easy one to identify in the field. First, there’s that white face. But wait. Some other dragonflies also have white faces, so don’t stop there. While his eyes are brown, his body is black overall, but he has a conspicuous yellow spot on segment 7.
You might not recognize his mate as being a Dot-tailed because, well, she has lots of dots. Her abdomen is yellow at the base and then large dots on segments 3 through 6, with a smaller one on segment 7. She also has along the sides of her abdomen.
There are more to share just in the Skimmer family, but for the first edition of Odonata Chronicles, we’ll leave it at that. Five species with so much variation is a lot to digest.