The photo above (by Niall Perrins) can be viewed in OdonataMAP here.
Olpogastra lugubris, commonly known as the Bottletail is a dragonfly in the family Libellulidae.
Length up to 62mm; Wingspan attains 89mm.
Olpogastra lugubris is unmistakable and the only member of its genus. Both sexes are similar in appearance and easily recognised by their long and very thin abdomens. The abdomen base is also noticeably swollen.
Most similar to Zygonoides fuelleborni, but that species has a noticeably broad abdomen that tapers near the waist.
A riverine species that frequents both seasonal and perennial rivers. Prefers shallow, flowing sections of rivers that are flanked by tall reeds, papyrus or trees.
Perches prominently on reed stems and tree branches that over hang the river. Usually sits fairly low down along the inside of river channels. The flight is fast and agile. Both sexes occur in the same area.
Status and Conservation
Uncommon and localised in South Africa, but may be common in other regions such as the Okavango Delta in Botswana. It is listed locally as Near Threatened in the IUCN Red List Of Threatened Species. The global listing for Olpogastra lugubris is of Least Concern.
Olpogastra lugubris is widespread throughout most of Sub-Saharan Africa.
Below is a map showing the distribution of records for Bottletail 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.