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RCN Odonata project (Conservation Assessment of Odonata in the Northeastern Region)

We conducted a conservation assessment of 227 species of Odonata (dragonflies and damselflies) in the Northeast region of the US in 2012-2014. The study area for this assessment was comprised of states and districts belonging to the Northeastern Association of Fish and Wildlife Agencies (NEAFWA) including CT, DE, DC, MA, ME, MD, NH, NJ, NY, PA, RI, VA, VT, and WV. We received odonate data from 22 project collaborators and compiled these records into a database of over 248,000 records. Please see Table 1 for a list of data sources used in our analysis. These records include information on species name, county, state, and country location, year, voucher, and source information.

The project steering committee (Erin White, Jeff Corser, and Matt Schlesinger of NYNHP, Pam Hunt of Audubon Society of NH, and Phillip deMaynadier of ME Dept. of Inland Fisheries and Wildlife) completed a vulnerability and responsibility assessment by the spring of 2014. We worked with Odonata experts and state agency representatives in the region to review our work and provide feedback on our products. We modeled our vulnerability assessment after the approach developed by NatureServe and the network of Natural Heritage programs (Master et al. 2012) for calculating global, national, and subnational (state and province) conservation status ranks. Our regional assessment used three rarity factors (range extent, area of occupancy, and habitat specificity), a threat factor (vulnerability of occupied habitats), and a trend factor (relative change in range) in combination to yield a single regional vulnerability rank (R-rank). NatureServe created distributional range maps for the entire US and Canadian range of all Northeastern Odonata. These maps will be available in the spring of 2014 by species on the NatureServe Explorer website ( We calculated regional responsibility as the proportion of the US & Canadian range occurring in the Northeast US. We combined our results of the vulnerability and responsibility analyses into a single prioritization matrix that places species in vulnerability and responsibility categories, and this product is available in our final report .