The northern emerald is a middle-sized species of dragonfly first described by Johan Wilhelm Zetterstedt in 1840. The male can be recognised by its pincer-like appendages and its narrow-waisted body. The female has distinctive orange-yellow spots on (only) the third segment of the abdomen.
Somatochlora sahlbergi, the treeline emerald, is a species of dragonfly in the family Corduliidae. It is found at high latitudes across northern Eurasia and North America, and occurs farther north than any other dragonfly.
The brilliant emerald, Somatochlora metallica, is a middle-sized species of dragonfly. It is the largest and greenest of the Somatochlora species; 50–55 millimetres (2.0–2.2 in) long.
Somatochlora elongata, the ski-tipped emerald or ski-tailed emerald, is a species of dragonfly in the family Corduliidae. It is found in North America.
Somatochlora albicincta, the ringed emerald, is a species of emerald dragonfly in the family Corduliidae. It is found in North America.
Somatochlora filosa, the fine-lined emerald, is a species of emerald dragonfly in the family Corduliidae. It is found in North America.
Somatochlora minor, the ocellated emerald, is a species of emerald dragonfly in the family Corduliidae. It is found in North America.
Somatochlora franklini, the delicate emerald, is a species of emerald dragonfly in the family Corduliidae. It is found in North America.
Somatochlora provocans, the treetop emerald, is a species of emerald dragonfly in the family Corduliidae. It is found in North America.
Somatochlora whitehousei, or Whitehouse's emerald, is a species of emerald dragonfly in the family Corduliidae. It is found in North America.
Somatochlora georgiana, the coppery emerald, is a species of emerald dragonfly in the family Corduliidae. It is found in North America.
Somatochlora hudsonica, the Hudsonian emerald, is a species of emerald dragonfly in the family Corduliidae. It is found in North America.
Somatochlora walshii, the brush-tipped emerald, is a species of emerald dragonfly in the family Corduliidae. It is found in North America.
Somatochlora tenebrosa, the clamp-tipped emerald, is a species of emerald dragonfly in the family Corduliidae. It is found in North America.
Somatochlora semicircularis, the mountain emerald, is a species of emerald dragonfly in the family Corduliidae. It is found in North America.
Somatochlora linearis, the mocha emerald, is a species of emerald dragonfly in the family Corduliidae. It is found in North America.
Somatochlora kennedyi, or Kennedy's emerald, is a species of emerald dragonfly in the family Corduliidae. It is found in North America.
Somatochlora williamsoni, or Williamson's emerald, is a species of emerald dragonfly in the family Corduliidae. It is found in North America.
Somatochlora forcipata, the forcipate emerald, is a species of emerald dragonfly in the family Corduliidae. It is found in North America.
Somatochlora septentrionalis, the muskeg emerald, is a species of dragonfly in the family Corduliidae. It is endemic to Canada, where it is found from Yukon and British Columbia east to Nova Scotia and Newfoundland.
