40. Pantana flavescens (Fabricius, 1798)

 Pantana flavescens (Fabricius, 1798) 

Family: Libellulidae

Genus: Pantana  

Species: Pantana flavescens (Fabricius, 1798)  

Similar Species: None

Common name: Wandering glider, Globe skimmer

Habitat: Marsh, open fields, grasslands

Distribution: All over the country  

Abundance: Common 

Flight season: October- January

IUCN Red List Status: Least concern

Worldwide distribution: distributed in many countries of Asia, Africa, Europe, Australia, North america and South America

Pantana flavescens is a migratory dragonfly found during the winter season in Bangladesh. They are usually observed flying above the open fields and grasslands. 

39. Gynacantha khasiaca (McLachlan, 1896)

Gynacantha khasiaca (McLachlan, 1896) 

Family: Aeshnidae

Genus: Gynacantha

Species: Gynacantha khasiaca (McLachlan, 1896)

Similar Species: None

Common name: N/A

Habitat: Forests

Distribution: Sylhet 

Abundance: Rare

Flight season: August

IUCN Red List Status: Data deficient

Worldwide distribution: India, Nepal, Myanmar

Gynacantha khasiaca is one the most beautiful dragonfly found in Bangladesh. This is one of the three Gynacantha species found in Bangladesh. The extremely rare species was first time recorded from Bangladesh in 2014.  

38. Trithemis festiva (Rambur, 1842)

Trithemis festiva (Rambur, 1842)  

Trithemis festiva (Rambur, 1842) 

 

Number: 38

Family: Libellulidae

Genus: Trithemis  

Species: Trithemis festiva (Rambur, 1842) 

Common name: Black Marsh glider

Habitat: Streams, waterfalls

Distribution: Chittagong, Sylhet 

Abundance: Common 

Flight season: March - August

Trithemis festiva one of the four trithemis species found in Bangladesh. The species I have sighted from Chittagong and Sylhet. Commonly, the species is observed nearby streams, waterfalls and stream associated forest patches. The species is distinguished from other species by its black color, bluish abdomen and yellow markings in the abdominal segments. 

                                                             Male

The male has blue thorax, legs are black, wings are transperant, yellow patches present in the wing base. 

I have observed the male from Khagrachari near richag water falls. The male was perching in the reeds of the streams.  

As the male gets older, it become more black. The thorax turns black from blue. Also, the abdominal yellow markings abolished. 

37. Trithemis aurora (Burmeister,1839)

Trithemis aurora (Burmeister,1839) 

Trithemis aurora (Burmeister,1839) 

 

Number: 37

Family: Libellulidae

Genus: Trithemis  

Species: Trithemis aurora (Burmeister, 1839) 

Common name: Crimson Marsh glider

Habitat: Streams, waterfalls

Distribution: Chittagong 

Abundance: Common 

Flight season: March - August

Trithemis aurora is very common, in fact, it is the most abundant dragonflies in the hilly regions of Chittagong. I have sighted hundreds of them in khagrachari, near waterfalls.  

                                                                 Male

The juvenile male are orange in color, the hind wing base has dark orange patch. The veins are orange, wing transperant, pterostigma black. 

the adult are spectacular colorful insect with scintillating reddish-pink color. The thorax and head is magenta in color, wing transparent, veins reddish. Lega black, anal appendages anterior red, posterior black.   

Female

The famales are less abundant than male and stay away from waterbodies except their breeding period, The females are like juvenile male, can be distinguished by looking att their anal appendages. 

36. Orthetrum pruinosum (Burmeister, 1839)

Orthetrum pruinosum (Burmeister, 1839)

Number: 36

Family: Libellulidae

Genus: Orthetrum 

Species: Orthetrum pruinosum (Burmeister, 1839) 
Common name: Crimson tailed Marsh hawk

Habitat: Forests, lakes, ponds 

Distribution: Chittagong, Sylhet

Abundance: Common

Flight season: June- November

                                                       Male

The males are spectacular insects with abdominal segments red. The thorax is black, legs are black, wings are transparent, pterostigma black.
  

The matting pair I have spotted from Sylhet. The pair was matting in the reeds associated to the streams.   

35. Neurobasis chinensis (Linnaeus, 1758)

Neurobasis chinensis (Linnaeus, 1758)

Number: 35

Family: Calopterygidae

Genus: Neurobasis 

Species: Neurobasis chinensis (Linnaeus, 1758)
Common name: Stream glory

Habitat: Waterfalls, streams

Distribution: Chittagong, Sylhet

Abundance: Not very common

Flight season: June- November

Neurobasis chinensis is one of the most beautiful damselfly, found in the eastern waterfalls of Bangladesh. 

                                                              Male

The males are green in color, the fore wings are clear, the hind wings are opaque. Abdominal segments are green, anal appendages are black. 

The male shows an amazing view of the upper side of its lower wing. When the male fly over the waterfalls it's an astonishing scenario to enjoy. 

Female

The females are similar to male, green in color stay adjacent to male nearby waterfalls. The wings are more clear  than males, and different shaped anal appendages are good key to distinguish from male.  

I have sighted this matting pair from the Rechang waterfalls in my last visit to Khagrachori.

Neurobasis chinensis mate in bushes associated with the waterfalls. The female then oviposit in the stream water. 

My documented video on the matting behavior of N. chinensis  can be seen from the below link 

N. chinensis matting 

34. Aristocypha quadrimaculata (Selys, 1853)

Aristocypha quadrimaculata (Selys, 1853)

Number: 34

Family: Chlorocyphidae 

Genus: Aristocypha  

Species: Aristocypha quadrimaculata (Selys, 1853)
Common name: N/A

Habitat: Waterfalls, streams

Distribution: Chittagong

Abundance: Not very common

Flight season: June- November

Aristocypha quadrimaculata is one of the spectacular damselflies found in the waterfalls of the north east and south east region of Bangladesh.  

                                                         Male

The males are black in color. The head, abdominal segments, anal appendages and legs are black. Thorax black with yellow stripes. More than half of the apical parts of the wings are opaque with violet stripes in the hind wings. 

                                                               Female 

The females are black in color too. The head is black, thorax is black with yellow stripe. abdominal segments has yellow color laterally. Wings are transparent, pterostigma and legs are black.