Little Duskhawker (Gynacantha manderica)

View the above photo record (by Georg Jacobs) in OdonataMAP here.

Find the Little Duskhawker in the FBIS database (Freshwater Biodiversity Information System) here.

Family Aeshnidae

Gynacantha manderica LITTLE DUSKHAWKER

Identification

Large size

Length reaches 68mm; Wingspan attains 87mm.

Despite its large size Gynacantha manderica is the smallest Gynacantha species in South Africa.

Most closely resembles Gynacantha usambarica but that species is green rather than light brown and has 21 to 27 Ax veins in the forewing. Gynacantha manderica has 13-19 Ax veins in the forewing. The two species also have differently shaped black markings on the forehead. May also be mistaken for Gynacantha villosa (Brown Duskhawker) but that species is far larger and has 22-28 Ax veins in the forewing and a four-celled anal triangle.

The sexes are similar.

Click here for more details on identification of the Little Duskhawker.

Gynacantha manderica – Female
Richardsbay, KwaZulu-Natal
Photo by Diana Russell

Habitat

Frequents pools, rivers, streams and lakes surrounded by dense woodland and forests. Also found away from water, hunting in forest clearings.

Habitat – Ndumo Game Reserve, KwaZulu-Natal
Photo by Ryan Tippett

Behaviour

Crepuscular, spending the day hidden in the shade of dense vegetation. Emerges to hunt at dawn and dusk, but also on warm overcast days. Often gregarious when foraging and frequently joins mixed species hunting swarms at dusk.

Hangs vertically from a perch when at rest.

On the wing from September to April.

Status and Conservation

Uncommon and localised in South Africa. Listed as of Least Concern in the IUCN Red List of Threatened Species.

Distribution

Gynacantha manderica is confined to Sub-Saharan Africa where it is fairly widespread from West Africa, across to East Africa and down to Southern Africa.

In South Africa it is found in the North and East where it is thinly distributed.

Below is a map showing the distribution of records for Little Duskhawker in the OdonataMAP database as at February 2020.

The next map below is an imputed map, produced by an interpolation algorithm, which attempts to generate a full distribution map from the partial information in the map above. This map will be improved by the submission of records to the OdonataMAP section of the Virtual Museum.

Ultimately, we will produce a series of maps for all the odonata species in the region. The current algorithm is a new algorithm. The objective is mainly to produce “smoothed” maps that could go into a field guide for odonata. This basic version of the algorithm (as mapped above) does not make use of “explanatory variables” (e.g. altitude, terrain roughness, presence of freshwater — we will be producing maps that take these variables into account soon). Currently, it only makes use of the OdonataMAP records for the species being mapped, as well as all the other records of all other species. The basic maps are “optimistic” and will generally show ranges to be larger than what they probably are.

These maps use the data in the OdonataMAP section of the Virtual Museum, and also the database assembled by the previous JRS funded project, which was led by Professor Michael Samways and Dr KD Dijkstra.

Dragonfly Atlas: Megan Loftie-Eaton, Sally Hofmeyr, Ryan Tippett & Les Underhill
Dragonfly Atlas: Megan Loftie-Eaton, Sally Hofmeyr, Ryan Tippett & Les Underhill
Megan Loftie-Eaton is our communications, social media and citizen science coordinator. Prior to her work for the BDI, she coordinated OdonataMAP, the Atlas of African Odonata. Sally Hofmeyr has many years' experience in the academic world, writing her own material and editing the work of others. Her academic background is in the natural sciences: her PhD and first postdoc in ornithology and environmental change (Animal Demography Unit, University of Cape Town). Ryan Tippett is an enthusiastic contributor to Citizen Science and has added many important and interesting records of fauna and flora. He has been a member of the VMU since 2014 and has currently submitted over 11000 records. He is also on the expert identification panel for the Odonata Map project. Prof Les Underhill has been Director of the Animal Demography Unit (ADU) at the University of Cape Town since it started in 1991. Although citizen science in biology is Les’s passion, his academic background is in mathematical statistics.