New York Natural Heritage Program
Extra-striped Snaketail
Ophiogomphus anomalus Harvey, 1898

Habitat [-]
The Extra-striped Snaketail inhabits clear, rapid and cold, medium to large rivers with high dissolved oxygen content and high water quality (Dunkle 2000, Mead 2003, Lee 2007). They can often be found perched on bushes near the tree line, bordering riffle areas of rivers (Dunkle 2000) and are known to spend much of their time aloft and perched high in the treetops (Mead 2003). Along the Aroostook River in Maine, emerging larvae of this species were the most widely distributed Ophiogomphid along a 137 Km river stretch occurring in both the upper reaches and downstream sections, but was most abundant in mid to lower reaches. These habitats were characterized by having higher percentages of land use devoted to human uses such as agriculture and industry and had higher temperatures, and a larger variety of substrate partcicles (silt, sand, cobble, pebble) than more upstream locales (Gibbs et al. 2004).

Associated Ecological Communities [-]
  • Cobble shore
    A community that occurs on the well-drained cobble shores of lakes and streams. These shores are usually associated with high-energy waters (such as high-gradient streams), and they are likely to be scoured by floods or winter ice floes.
  • Confined river
    The aquatic community of relatively large, fast flowing sections of streams with a moderate to gentle gradient.
  • Riverside ice meadow
    A meadow community that occurs on gently sloping cobble shores and rock outcrops along large rivers in areas where winter ice floes are pushed up onto the shore, forming an ice pack that remains until late spring. The ice scours the meadow, cutting back woody plants.

Associated Species [-]
  • Rapids Clubtail (Gomphus quadricolor)
  • Brook Snaketail (Ophiogomphus aspersus)
  • Riffle Snaketail (Ophiogomphus carolus)
  • Pygmy Snaketail (Ophiogomphus howei)
  • Maine Snaketail (Ophiogomphus mainensis)
  • Rusty Snaketail (Ophiogomphus rupinsulensis)
  • Common Sanddragon (Progomphus obscurus)