Damselfly/Dragonfly Fieldmark Details
Enallagma durum (Big Bluet) - male
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Length 1.3-1.7 inches. The coloring is all blue and black.
The eye spots are blue and narrow and are connected by a noticeable occipital bar.
The thorax has a black mid dorsal bar and black shoulder stripes but it also has a narrow blue line in the middle of the black mid dorsal bar. This bar is called a carina.
The black marks on the top of the abdomen are pointed. The mark on the top of segment 3 covers at least ½ of the length of the segment.
October 2009, Occoquan Bay NWR, VA. Range - Coastal MA to TX.
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by Ken Larsen --
Contact me at KenLarsen@explorewithimages.com