|Orthetrum is a genus of dragonflies
in the Libellulidae family. It is a very large genus, spread across the
Orthetrum pruinosum (Burmeister,
1839) is a widespread species occurring from west India to Japan and south
to Java and the Sunda Islands.
The male has a length in abdomen
28-31mm, hind wing 32-36mm. The male has a face of ochreous to pale reddish
brown; Eyes blue black above and bluish
grey below; Thorax is covered with
fine hairs and reddish brown to dull purple; Legs black and reddish brown
at the base; Wings transparent, in old adults, it is pale brown towards
the tip; On the fore and hindwings, the basal area is marked with reddish
brown. Wing spot is Reddish brown. Abdomen bright red, in old adults it
is purplish due to pruniscence.
Female abdomen 30mm, hind wing 37mm.
The female has a face of pale olivaceous; Eyes yellowish, capped with brown;
Thorax reddish brown or dull ochreous with indistinct lateral brown stripe;
Wings Similar to male but the basal markings are indistinct; Abdomen is
dull ochreous with each segment thinly bordered with black.
This is a very common dragonfly of
wells, ponds, ditches, tanks and rivers. Males are very conspicuous and
can be seen perched on shrubs, stones etc. Breeds in puddles,
ponds and tanks.
Aside from the nominate subspecies,
three other subspecies are recognised. O. p. neglectum is widespread in
mainland Asia, O. p. schneideri occurs in the Malay peninsular and Borneo,
and O. p. clelia occurs in the Philippines and Taiwan (where O. p. neglectum
occurs also). O. p. clelia is likely to be a separate species, and O. p.
schneideri is likely to be a junior synonym of clelia. A further subspecies
is sometimes recognised, O. p. migratum, but sometimes is consisdered to
be a separate species O. migratum.
Orthetrum pruinosum is a widely distributed
species that is not threatened. It is listed by IUCN Red List as Least