Vagrant Emperor (Anax ephippiger)

View the above photo record (by Jaco Botes) in OdonataMAP here.

Find the Vagrant Emperor in the FBIS database (Freshwater Biodiversity Information System) here.

Family Aeshnidae

Anax ephippiger VAGRANT EMPEROR

Identification

Large size

Length up to 67mm; Wingspan attains 110mm.

Unlike any other species in Southern Africa. The yellow brown colouration and bright blue saddle of the males render them unmistakable.

Females in flight may be mistaken for Pantala flavescens (Wandering Glider), the two species often occur side by side. The wandering glider is smaller, often orange to red in colour and has a distinctive, tapered body shape.

Click here for more details on identification.

Anax ephippiger – Male
Near Hluhluwe, KwaZulu-Natal
Photo by Ryan Tippett

Habitat

The favoured breeding habitat is seasonal pools, pans and dams which it rapidly colonises after rain. Liable to turn up almost anywhere after rain.

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

Behaviour

A highly nomadic and opportunistic species. Typically appears in an area shortly before or after rain, where it may breed if conditions are favourable, before moving on.

The Vagrant Emperor is a highly aerial species that spends long periods on the wing. Often forms or joins mixed species hunting swarms at dusk. Often seen singly but is frequently gregarious.

Rests by hanging vertically from a perch.

Most active from September to May (see Phenology below).

Status and Conservation

Common to abundant when present. Listed as of Least Concern in the IUCN Red List of Threatened Species.

Distribution

Distributed widely across Africa, Europe and central and southern Asia. Also occurs on many of the Indian Ocean islands.

The South African distribution is centered around the wetter northern and eastern regions, although vagrants could turn up almost anywhere.

Below is a map showing the distribution of records for Vagrant Emperor 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

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.