After I sent the recent photos of the Common Green Darner, May Chen reminded me that I could have mentioned that this is one of the few dragonfly species that migrates. Another migratory species that we see locally is the Variegated Meadowhawk, Sympetrum corruptum. We saw this one at Ellis Creek the same day we watched the Green Darner.
The Variegated Meadowhawk is very common, and although the colors can vary (duh…), several features make it easy to identify. On the sides of the thorax you can usually see 2 diagonal white stripes, each ending in a bright yellow dot. On the wings you may be able to see that the small stigma on each wing near the end is bicolored, darker in the center and lighter at the ends. Red veins near the leading edge can be seen in some photos. On the abdomen there is row of white spots, or "portholes" (Manolis), and two dark spots on the top of the 2 segments near the end (8-9). Red/coral rings on the abdominal segments add color and interest, and he has a pretty face as well!
Another view:
May Chen sent this great link to a remarkable TED talk of how a scientist discovered the migration patterns of the Wandering Glider in Asia (from India to Africa!) - it is well worth your time, providing a great example of how a scientist gradually put observations together to paint a full picture:
The Xerces Society has initiated a project for gathering data on 5 species of migratory dragonflies, including the Common Green Darner and the Variegated Meadowhawk. If you'd like to learn about how you can help gather data for the project:
Brief Taxonomy-
Family Libellulidae is huge, with over 1,000 species wordwide. These are the Skimmers and allies.
Genus Sympetrum is big too, with over 50 species.
Species Sympetrum corruptum, the Variegated Meadowhawk. Seen widely across much of Canada and the US and south into Central America.
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