Baskettail dragonflies

Several species of baskettail dragonflies (Epitheca sp.) are among the first odonates to emerge in spring.

22 APR 2019 | PRR | baskettail dragonfly (Epitheca sp.)

Two baskettail dragonflies, possibly either Common Baskettail (E. cynosura) or Slender Baskettail (E. costalis), were spotted at the North Tract of Patuxent Research Refuge, Anne Arundel County, Maryland USA.

Look closely at the full-size version of the following photo. Notice the leading edge of the left fore-wing is slightly malformed.

22 APR 2019 | PRR | baskettail dragonfly (Epitheca sp.)

[Baskettails] have proven to be very difficult to identify, particularly from photographs. Most species are quite variable and there is evidence that they may hybridize and or integrade, making identifications even tougher. Source Credit: Identification of Male Epitheca (Tetragoneuria) in Texas, by John C. Abbott.

I’m unable to identify these dragonflies to the species level. In fact, I’m not sure they’re the same species! I defer to odonate hunters with more expertise than me for help with identification of both species and gender.

Post Addendum

According to Michael Boatwright, founder and administrator of the Virginia Odonata Facebook group, both individuals are male Common Baskettail. Male Common- and Slender Baskettail have curved cerci; females of both species have straight cerci. That’s good baskettail knowledge, Mike Boatwright!

Copyright © 2019 Walter Sanford. All rights reserved.

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2 Responses to “Baskettail dragonflies”

  1. Michael Boatwright Says:

    They both look like Common (E. cynosura). The waist does not appear pinched in enough for Slender (E. costalis). In addition, the outward bend in the cerci appears to start closer the tip than to the base which also supports E. cynosura. However, it is often not possible to positively identify males of these two species from photographs. The most definative way to detetmine species is to measure the length of the cerci. The minimum length for E. costalis is 3.40 mm.

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