Pygmy Basker (Aethriamanta rezia)

View the above photo record (by Diana Russell) in OdonataMAP here.

Find the Pygmy Basker in the FBIS database (Freshwater Biodiversity Information System) here.

Family Libellulidae

Aethriamanta rezia PYGMY BASKER

Kirby, 1889

Identification

Very small size

Length up to 29mm; Wingspan attains 47mm.

Both sexes are distinctive and easily recognisable.

Most similar to Macrodiplax cora (Coastal Pennant). That species is larger and has differently shaped markings along the top of the abdomen. In addition Macrodiplax cora has far less amber in the hind wings.

Click here for more details on identification of the Pygmy Basker.

Aethriamanta rezia – Male
Okavango Delta, Botswana
Photo by Ryan Tippett
Aethriamanta rezia – Female
Okavango Delta, Botswana
Photo by Ryan Tippett

Habitat

Primarily a coastal species in South Africa. Inhabits sedge and water lily filled ponds and pans on floodplains and in marshes. They are also found at richly vegetated oxbow ponds along meandering rivers and streams. Found in both grassland and forested environments, provided there is suitable aquatic habitat.

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

Behaviour

Adult males perch prominently on sedge and reed stems over the water. Females and immature males are mostly found away from the water perched on bushes and trees.

Most active from October to April (see Phenology below).

Status and Conservation

Overall, an uncommon species in South Africa. It is listed as of Least Concern in the IUCN Red List of Threatened Species. It is found mostly in undisturbed habitats and is not very tolerant of habitat degradation.

Distribution

Widespread throughout the wetter parts of sub-Saharan Africa. Occurring from, Senegal across to Kenya and down to South Africa. It is also found in parts of northern Madagascar. In South Africa it is mostly restricted to the NE coastal plain of KwaZulu-Natal.

Below is a map showing the distribution of records for Pygmy Basker 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.

Phenology

Further Resources

Virtual Museum (OdonataMAP > Search VM > By Scientific or Common Name)

More common names: Dwergsonvangertjie (Afrikaans)

Type Locality: Madagascar, no locality data available.

Recommended citation format: Loftie Eaton. M; Hofmeyr S; Tippett RM; Underhill L. Pygmy Basker Aethriamanta rezia. Biodiversity and Development Institute. Available online at http://thebdi.org/2020/06/12/pygmy-basker-aethriamanta-rezia/

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.