Archive | September 28, 2016

Late Season Bluets

Bluet sp.

I was intrigued by the small blue damselflies I saw lurking in the vegetation at the storm water ponds earlier on Sunday, so I returned later that afternoon with my net in order to catch them and identify them. The blue-type bluets are among the most difficult damselflies to identify, requiring a hand lens to see the male’s terminal appendages in order to distinguish between several similar-looking species. Fortunately there are fewer species flying this time of the year than in June and July, narrowing down the tricky possibilities to only a handful: Northern Bluet flies until mid-September, while both Familiar Bluet and Tule Bluet fly into October. Other blue-type bluets are already gone for the year, including Hagen’s Bluet (which flies until mid-August) and Marsh Bluet (which flies until early September).

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