Prelims
The Spoon-tailed Duskhawker
Context: Researchers have documented the first verifiable photographic record of the rare Spoon-tailed Duskhawker (Gynacantha basiguttata) along the Miao-Vijaynagar Road inside Arunachal Pradesh’s Namdapha National Park and Tiger Reserve.
About The Spoon-tailed Duskhawker:
What It Is?
- The Spoon-tailed Duskhawker (Gynacantha basiguttata) is a large, predatory dragonfly species belonging to the Aeshnidae family (hawkers and darners) within the insect order Odonata.
- Originally described from the Philippines, it is native to parts of Southeast Asia and is known for its crepuscular (active during dawn and dusk) behavior.
Habitat & Distribution:
- Ecosystem: Inhabits dense, evergreen and semi-evergreen tropical rainforests, typically frequenting humid, low-light understories near forest streams, temporary pools, and marshy wetlands.
- Microhabitat: Prefers heavily shaded microhabitats; adults often roost vertically suspended from foliage during cloudy or daylight hours.
- Geographical Range: Southeast Asia (including the Philippines) and now confirmed in northeastern India within the Namdapha National Park and Tiger Reserve in Changlang district, Arunachal Pradesh.
Key Characteristics:
- Spoon-Shaped Anal Appendages (Cerci): Named after the distinct structure of the male cerci, which are narrow at the base and dilate outward into broad, spoon-like tips used for grasping during mating.
- Distinctive Black T-Mark on Frons: Features a well-defined black, T-shaped marking on the frons (the anterior portion of the head), serving as a crucial taxonomic identifier.
- Unstriped Olive-Green Thorax: Possesses a uniform, plain olive-green thorax lacking distinct stripes or bands, setting it apart from closely related species like Gynacantha khasiaca.
- Specific Wing Pigmentation: Displays characteristic amber or brownish suffusion and dark pigmentation concentrated near the basal segments of its clear, membranous wings.
- Crepuscular Flight Behavior: Highly adapted to low-light foraging conditions, flying actively around dusk and dawn to hunt small flying insects and perching vertically under dense canopy cover by day.
