||Jesse W. Jaycox
Family: Spiketails (Cordulegastridae)
State Rarity Rank:
Global Rarity Rank:
Did you know?
There are at least 35 known species of Spiketails worldwide, with four species known to occur in New York State (Nikula et al. 2003, New York Natural Heritage 2007).
|State Ranking Justification||
The Tiger Spiketail is known to occur in seven counties in New York State, with no population estimates determined. Further survey efforts may result in the identification of additional populations or range expansions, and may enable population sizes to be estimated.
No estimate of population size for this species has been made based on observations from five New York counties made in the mid-1990s to present (New York Natural Heritage Program 2007). General reports of observations made in the early 1990s include locations in two additional counties (Donnelly 2004), and information prior to this time frame is limited. Therefore, any new location information on the Tiger Spiketail in New York may reflect heightened interest in surveying for this species rather than a population increase or a range expansion (Holst 2005).
Two observations of the Tiger Spiketail have been made prior to the mid-1990s in Essex and Tompkins counties and recent observations from the mid-1990s to present have been made in Putnam, Westchester, Rockland, Schuyler, and Erie counties (Donnelly 2004, New York Natural Heritage Program 2007). Since the full extent and size of the populations have not been determined, long-term trends are unclear.