New York Natural Heritage Program
Subarctic Darner
Aeshna subarctica Walker, 1908
Insects

Threats [-]
There are no obvious threats to the habitat that supports the single known population in New York although there may well be threats to other, as yet unidentified, populations. Little published information is available citing specific cases of negative impacts to bog and fen odonates, but any activities which degrade the sensitive hydrology of these habitats would threaten populations of this species. Examples include peat mining, ditching, filling, eutrophication, direct effects of pesticides (e.g. for mosquito control or from agricultural runoff), and increases in the sediment load of the wetland (such as might result from agricultural runoff or removal of vegetation from the adjacent uplands). Succession could also threaten some sites as shallow pools fill in with vegetation over time. Removal of large areas of forest or shrub habitats adjacent to occupied wetlands could also threaten populations as these adjacent habitats are important for recently emerged adults until they reach maturity.

Research Needs [-]
Research aimed at obtaining information on population size at occupied sites would be useful in determining the overall population for this species in the state.