Subarctic Darner
Valley City State University
Larval stage has long abdomen, large eyes and mouthparts that lie flat under the head. The last four abdominal segments have spines. Larval stage present throughout the open water season but most abundant through July-August when they typically emerge into the adult stage.
Status in North Dakota
Year-round resident of North Dakota waterbodies as larvae.
Nymphs become adults in late summer with the adult stage lasting a few weeks to months.
Range Map
Aeshna subarctica potential range in North Dakota. Aeshna spp.
Reason for SWAP Designation
A regional species of concern with limited data in North Dakota but the most likely range includes the Turtle Mountains, Pembina Gorge, and Devils Lake Hills.
Also, an at-risk species based on expert review (SGCN c).
Aeshna subarctica has a sparse distribution across the United States but more discoveries due to increased survey effort in recent years have their range expanding.
Threats
Extremely limited habitat availability, wetland drainage, land development, climate change, energy development, eutrophication, and agricultural practices.
Research and Monitoring
Limited research has been conducted.
The North Dakota Department of Environmental Quality (NDDEQ) conducts biological monitoring surveys on State waters as part of their Index of Biotic Integrity (IBI) development.
Additionally, a monitoring protocol for aquatic invertebrates is being developed by the North Dakota Game and Fish Department (NDGF) under the State Wildlife Grant Program with implementation as a future goal.
Additionally, a survey of aquatic invertebrates in cooperation with Valley City State University is currently underway to gain additional baseline information on SGCN’s.
Management Recommendations
- Protect and conserve large, intact tracks of native/unbroken forested areas.
- Develop/maintain buffers along riparian areas.
- Partner with local, state, and federal entities to limit chemical use in/near aquatic habitats.
- Encourage efficient use of pesticides.
Primary Geological Regions
Habitat Associations
Habitat Use
Occurs in swamps, fens, and bogs with a clearly defined vegetative boundary.