Home         NJ Odonata Survey Data & Checklists
Species Accounts & Photos Other Stuff NJ's Species of Concern

  Northern Bluet
            Enallagma annexum (Hagen, 1861)

NOTE: please notify us of any sightings of this damselfly - click HERE

Species distribution map

Range & Habitat:

Recorded from northern counties where it is found in bigs and fens along the Kittatinny Ridge and in the highlands.



 

Click on the thumbnails to enlarge additional photos. 

Description:

Largely blue, with a relatively narrow black humeral stripe, it is virtually identical to the less common Boreal Bluet.  The postocular spots are large and rounded-triangular, narrowly separated from a thin occipital bar.  Can be distinguished from Familiar Bluet by the large postocular spots and the shorter cerci.  Can be told from the Hagen's/Marsh complex by the size and shape of the postocular spots and possibly by the nearly all black S10.

Recently split from the Palearctic E. cyathegerum.

 

Conservation Status:

State: S2 - Imperiled in New Jersey

Global: G5 - Secure globally, but possibly rare in parts of its range

For a full explanation of the ranks, click here

Flight season:

Early Date: 5/18
Late Date: 7/9

Please scroll down for monthly graph.

 

Flight Season

(hover your mouse over the bar for actual data)
 
Number of Records
2 4 2 0 0 1
J F M A M J J A S O N D

Months

Dragonflies need clean water. Do your part to protect our watersheds. Click here for more information.

Click here for acknowledgments
Date, distribution, and status data courtesy of Allen Barlow, NJOS

2006 Jim Bangma, NJOS  Comments or suggestions?  Use the Feedback Form