Delta-spotted Spiketail - Cordulegaster diastatops (Selys, 1854)

This is a species of concern. Please report any encounters to Odonata Central.

Range & Habitat:
Has been recorded in scattered locations around the state which may indicate spotty distribution or a lack of complete censusing.

Small streams, seeps and trickles, usually larger than Tiger or Arrowhead Spiketail habitat but absent from the larger streams and small rivers where Twin-spotted is found.

Flight Season:
Early Date: 21 April
Late Date: 8 July

Flight season charts created from records in the official database maintained by Allen Barlow.

Male Dorsal - Photo by Jim Bangma
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Black or dark brown, with prominent yellow thoracic stripes and large arrow or delta shaped yellow lateral spots on the abdomen. Twin-spotted Spiketail also has pairs of spots, but they are smaller and located dorsally, nearly touching. Arrowhead Spiketail has a single row of arrow shaped dorsal spots.

River Cruisers have a single lateral thoracic stripe and different behavior.

Conservation Status:
State: S3S4 Apparently secure but should be watched
Global: G5 Secure globally, but possibly rare in parts of its range