Thank you for visiting our website.

Please note that the site is not fully functional at the moment as we are in the process of re-developing. We hope that you will find the available resources helpful in the meantime.

German wasp | Vespula germanica

German wasp

Vespula germanica

Coral bush | Ardisia crenata

Coral bush

Ardisia crenata

Purple loosestrife | Lythrum salicaria

Purple loosestrife

Lythrum salicaria

Pom pom weed | Campuloclinium macrocephalum

Pom pom weed

Campuloclinium macrocephalum

Canarybird bush | Crotalaria agatiflora

Canarybird bush

Crotalaria agatiflora

Peanut butter cassia | Senna didymobotrya

Peanut butter cassia

Senna didymobotrya

Rubber vine | Cryptostegia grandiflora

Rubber vine

Cryptostegia grandiflora

1 2 3 4 5 6 7

Environmental Programmes

In order to tackle our country’s socio-economic challenges, the government adopted the Outcomes based approach to improve government performance and providing focus on service delivery. find out more


Addax nasomaculatus

Common name:


Scientific name:

Addax nasomaculatus

Alternative common names:

White antelope and screwhorn antelope. 

The addax is a desert-living antelope and is well adapted to its harsh habitat. It feeds on desert grasses and scrub. It travels great distances over the Sahara Desert searching for sparse vegetation. It is the most desert-adapted of the antelopes. It spends most of its life without drinking water, receiving enough moisture to survive from the vegetation on which it feeds. 

Additional Info

  • Where does this species come from?

    Found across northern Africa, from the west to the east of the Sahara Desert.

    What is its invasive status in South Africa?

    NEMBA Category 2.

    Where in South Africa is it a problem?

    Free State and Eastern Cape.

    How does it spread?

    Uncontrolled hunting by trophy hunters.

    Why is it a problem?

    They compete with cattle for grazing land.

    What does it look like?

    Description: The addax is sandy to almost white in colour during summer, darkening to a greyish brown in winter. White markings are present on the face, ears, belly, hips and legs, and there is a black tuft of hair on the forehead. Horns are present on both males and females, on average about 72cm in length. The horns have approximately one-and-a-half to three spiral twists. The hooves are widely splayed as an adaption to travelling over desert sand. The addax head-body length is 150-170cm, shoulder height is 95-115cm, and tail length is 25-35cm, with males being slightly larger than females. Habitat: It inhabits sand and stony desert regions. Breeding: Breeding can occur throughout the year, with population birth peaks in winter and early spring. Gestation lasts 257-264 days, and there is almost always one calf born. The calf is weaned after 23-39 weeks. Males are sexually mature at about 24 months, females during their second or third summer.

Read 8887 times

General News Updates

2019 National Symposium on Biological Invasio…


This is your invitation to South Africa's 2019 National Symposium on Biological Invasions. The convention is hosted by the Centre for Invasion Biology (CIB), University of Stellenbosch, and the Biolo... Read more

2019 Invasive Species Training


During the past five years (2014-2018), ISSA invasive species trainers have trained 4 000 in the identification of invasive species and laws pertaining to invasive species across South Africa.  ... Read more

Alien Grass Working Group


Who are we? The South African National Alien Grass Working Group was jointly initiated by the South African Biodiversity Institute (SANBI) and the Centre for Excellence in Invasion Biology (C·I·B) in... Read more

Permits for planting indigenous Cynodon?


On 16 February, 2018, South Africa's Department of Environmental Affairs issued amendments to the regulations and lists relating to the National List of Invasive Species.  Updates to the draft&n... Read more

Invasive species training 2018 dates released


Interested in invasive species?  How much do you know about NEMBA invasive species compliance for landowners and organs of state? The South African Green Industries Council (SAGIC) have released... Read more

Communications post for Africa advertised


The Nature Conservancy has advertised a brand new post:  Communications Manager, Africa Region. Knowledge of invasive species and water would be an asset in this post. See details below:    Job Titl... Read more