New York Natural Heritage Program
Little Bluet
Enallagma minusculum Morse, 1895
Insects

Threats [-]
The largest New York population's habitat has residential development surrounding it and is used for recreation where trampling of pond vegetation has been observed (New York Natural Heritage Program 2011). In 2009, invasive Asiatic clams (Corbicula corbicula) were found at this location and monitoring the site every two years with a threat assessment is suggested (White et al. 2010). Any activity which might lead to water contamination or the alteration of natural hydrology could impact Little Bluet populations (NYS DEC 2005). Such threats might include roadway and agricultural run-off, ditching and filling, eutrophication and nutrient loading from fertilizers and septic systems, changes in dissolved oxygen content, and development near their habitats (NYS DEC 2005). Groundwater withdrawal is a potential threat in lentic habitats on Long Island, as are invasive plant species replacing native plants required for oviposition (New York Natural Heritage Program 2011). Both emergence rates and/or species ranges may shift for odonate species as a result of climate change (Kalkman et al. 2008).

Conservation Strategies and Management Practices [-]
Any efforts to reduce roadway and agricultural run-off, eutrophication, development of upland borders to ponds and resulting increased groundwater withdrawal, invasive plant and animal species, trampling of vegetation from recreation, and ditching and filling activities should be considered when managing for this species (NYS DEC 2005, White et al. 2010). Maintenance or restoration of native shoreline vegetation and surrounding upland habitat will benefit this species, as females require native emergent vegetation for successful reproduction and spend much of their time in upland habitats away from the breeding pond (Gibbons et al. 2002, White et al. 2010).

Research Needs [-]
Further inventory is needed to define the extent of populations of Little Bluets in New York. In addition, research is required to understand the habitat requirements and threats to this species. In particular, the impact of the newly arrived invasive Asiatic clam (Corbicula corbicula) at a Suffolk county site should be evaluated through monitoring and a threat assessment (White et al. 2010). A recovery plan for the species should be developed and appropriate management guidelines should be adopted for its persistence in known locations (NYS DEC 2005).