Inspector (Chalcostephia flavifrons)

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

Find this species in the FBIS database (Freshwater Biodiversity Information System) here.

Family Libellulidae

Chalcostephia flavifrons INSPECTOR

Identification

Small size

Length up to 35mm; Wingspan reaches 66mm.

Males can be confused with an Orthetrum species or with Hemistigma albipunctum (African Piedspot). They are easily distinguished by their yellow faces and bright metallic green frons. The pale pterostigmas have a dark outline and are another good identification feature.

Females resemble those of Notiothemis jonesi (Eastern Forestwatcher). They can be differentiated by wing venation and the pale dark edged pterostigmas.

Click here for more details on identification.

Chalcostephia flavifrons – Linyanti, Botswana
Photo by Ryan Tippett

Habitat

This dragonfly iinhabits humid forests where it frequents ponds and the still backwaters of streams and rivers. It is a typical species of swamp forest and also occurs around the forested fringes of pans in low-lying and coastal areas.

Habitat – Near Kosi Bay, KwaZulu-Natal
Photo by Ryan Tippett

Behaviour

Often found in the dappled light of the forest sub-canopy where the males sit prominently on the tips of twigs and branches over the water. Mostly sits between 1 to 3m above the ground or water. The ‘Inspector’ name is derived from its habit of moving the head at different angles when surveying its surroundings. The females can be found in the same area as the males but are usually further away from the water.

Status and Conservation

Due to its choice of habitat, Chalcostephia flavifrons is very localised in its occurence. They seldom occur in large numbers.

The Inspector is fairly sensitive to habitat degradation, but it does occur at some suitable man-made habitats and in places with some alien plant growth. Its habitat is threatened by agriculture in some areas.

It is listed as of Least Concern in the IUCN Red List of Threatened Species.

Distribution

It is native to tropical Africa, where it is widespread. Occurs from West Africa to East Africa and down to South Africa.

Below is a map showing the distribution of records for Inspector 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.