New York Natural Heritage Program
Gray Petaltail
Tachopteryx thoreyi (Hagen in Selys, 1858)
Insects
Tachopteryx thoreyi Martha Reinhardt
Family: Petaltails (Petaluridae)

State Protection: Species Of Special Concern
A native species at risk of becoming Threatened; does not qualify as Endangered or Threatened, but have been determined to require some measure of protection or attention to ensure that the species does not become threatened. NYSDEC may regulate the taking, importation, transportation, or possession of any Species of Special Concern as it deems necessary.

Federal Protection: Not Listed

State Rarity Rank: S2
A State Rarity Rank of S2 means: Typically 6 to 20 occurrences, few remaining individuals, acres, or miles of stream, or factors demonstrably make it very vulnerable in New York State.

Global Rarity Rank: G4
A Global Rarity Rank of G4 means: Apparently secure globally, though it may be quite rare in parts of its range, especially at the periphery.


Did you know?
The gray petaltail is the only northeastern dragonfly species whose larvae may not be truly aquatic. The larvae live in the mud and vegetation of mucky, mossy, spring seeps which often contain very little standing water (Needham et al. 2000, Nikula et al. 2003).

State Ranking Justification [-]
As of 2006, there are just 11 confirmed locations for this uncommon and local species. Several of the sites are in close proximity to one another and could be functioning as a single metapopulation. While additional, undiscovered populations are expected, the specific nature of the species' habitat suggests that the number of sites may not be large. Although most known populations are on protected lands, populations for this species are not thought to be particularly large and there are some potential threats to the species.

Short-term Trends [-]

Long-term Trends [-]