New York Natural Heritage Program
Blackwater Bluet
Enallagma weewa Byers, 1927

Habitat [-]
Throughout the Northeast, Blackwater Bluets are found in streams and rivers and more rarely in lakes (Lam 2004). However, the two New York sites are coastal plain ponds; one is surrounded by coastal plain poor fen (New York Natural Heritage Program 2011a).

Associated Ecological Communities [-]
  • Coastal plain pond
    The aquatic community of the permanently flooded portion of a coastal plain pond with seasonally, and annually fluctuating water levels. These are shallow, groundwater-fed ponds that occur in kettle-holes or shallow depressions in the outwash plains south of the terminal moraines of Long Island, and New England. A series of coastal plain ponds are often hydrologically connected, either by groundwater, or sometimes by surface flow in a small coastal plain stream.
  • Coastal plain poor fen
    A wetland on the coastal plain fed by somewhat mineral-rich groundwater and slow decomposition rates of plant materials in the wetland (and thus develops peat). Plants are generally growing in peat composed primarily of Sphagnum mosses with some grass-like and woody components.

Associated Species [-]
  • Skimming Bluet (Enallagma geminatum)
  • Little Bluet (Enallagma minusculum)
  • Slender Bluet (Enallagma traviatum)
  • Blue Corporal (Ladona deplanata)
  • Spangled Skimmer (Libellula cyanea)
  • Elfin Skimmer (Nannothemis bella)
  • Sphagnum Sprite (Nehalennia gracilis)