Corkscrew Hooktail (Paragomphus elpidius)

View the above photo (by Wil Leurs) in OdonataMAP here.

Find the Corkscrew Hooktail in the FBIS database (Freshwater Biodiversity Information System) here.

Family Gomphidae

Paragomphus elpidius CORKSCREW HOOKTAIL

Identification

Medium-large size

Length up to 50mm; Wingspan reaches 59mm.

An attractive, bright green and brown species. The males possess well-developed foliations on the abdomen and strongly hooked claspers.

Most similar to Paragomphus genei (Common Hooktail). The Corkscrew Hooktail has a brighter green thorax with more distinct brown markings. In addition, the foliations on the lower abdomen of P. elpidius are distinctly larger. The superior appendages are more robust and strongly hooked. The two species differ too in the colour of the pterostigmas. Paragomphus elpidius has all dark pterostigmas. Those of Paragomphus genei are pale with dark borders.

Click here for more details on identification of the Corkscrew Hooktail.

Paragomphus elpidius – Male
Ndumo Game Reserve, KwaZulu-Natal
Photo by Ryan Tippett
Paragomphus elpidius – Female
Ndumo Game Reserve, KwaZulu-Natal
Photo by Ryan Tippett

Habitat

The Corkscrew Hooktail inhabits warm savanna regions where there are large, fast-flowing rivers. Often found where there are wide gravel banks and in hot, dry valleys.

Typical habitat – Usutu River, Ndumo Game Reserve, KwaZulu-Natal
Photo by Ryan Tippett

Behaviour

Paragomphus elpidius is a shy and alert species that can be difficult to approach. Usually perches low down on rocks, sticks and plant stems close to the water. During the heat of the day they perch among trees and bushes, often above the riverbank. This species hunts from a perch. It makes swift flights to intercept prey.

Status and Conservation

A localised and scarce species. However, it can be fairly common at some sites.

Listed as of Least Concern in the IUCN Red List of Threatened Species. It is fairly sensitive to habitat degradation. The Corkscrew Hooktail prefers undisturbed sites.

Distribution

Paragomphus elpidius is found in Eastern and Southern Africa. It occurs from Uganda and Kenya in the north down to South Africa.

Below is a map showing the distribution of records for Corkscrew Hooktail 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.