Male with raised abdomen that may be a threat display or a response to heat (the obelisk posture)
Female
Conservation status
Least Concern (IUCN 3.1)[1]
Scientific classification
Domain:
Eukaryota
Kingdom:
Animalia
Phylum:
Arthropoda
Class:
Insecta
Order:
Odonata
Infraorder:
Anisoptera
Family:
Libellulidae
Genus:
Pachydiplax Brauer, 1868
Species:
P. longipennis
Binomial name
Pachydiplax longipennis
(Burmeister, 1839)
The blue dasher (Pachydiplax longipennis) is an insect of the skimmer family. It is the only species in the genus Pachydiplax. It is very common and widely distributed through North America and into the Bahamas.[2]
Although the species name longipennis means "long wings", their wings are not substantially longer than those of related species. Females do, however, have a short abdomen that makes the wings appear longer in comparison.[2] The blue dasher grows up to 25–43 millimetres (0.98–1.69 in) long.
The males are easy to recognize with their vibrant blue color, yellow-striped thorax, and metallic green eyes. Females are somewhat less colorful than the male, an example of sexual dimorphism. While they have a matching yellow-striped thorax, their abdomen has a distinct brown and yellow striping that sets them apart from the male, along with contrasting red eyes. Both sexes develop a frosted color with age.[3]
Pachydiplax longipennis exhibits aggression while finding mates and foraging,[4][5] and they are not under any conservation threats.[6]
Male on a lotus leaf
Ovipositing Naperville USA
^Paulson, D.R. (2018). "Pachydiplax longipennis". IUCN Red List of Threatened Species. 2018: e.T51279390A65836579. doi:10.2305/IUCN.UK.2018-1.RLTS.T51279390A65836579.en. Retrieved 29 July 2023.
^ abJames G. Needham; Minter J. Westfall, Jr.; Michael L. May (2000). Dragonflies of North America (rev. ed.). Gainesville, FL: Scientific Publishers. pp. 762–763. ISBN 0-945417-94-2.
^"Blue Dasher". Odonata Central. The University of Alabama Museums Research and Collections. Archived from the original on 25 October 2016.
^Cite error: The named reference :1 was invoked but never defined (see the help page).
^Cite error: The named reference :2 was invoked but never defined (see the help page).
^Cite error: The named reference :0 was invoked but never defined (see the help page).
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Global Information
Male on a lotus leaf