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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

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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

How the distributions of the major invasive alien bird species have changed in South Africa over two decades

How the distributions of the major invasive alien bird species have changed in South Africa over two decades
Les G. UNDERHILL, Michael Brooks
Animal Demography Unit, Department of Biological Sciences, University of Cape Town, Rondebosch 7701, South Africa

Invasive alien bird species in South Africa form two categories: widespread (Common Myna, Mallard, Common Starling, House Sparrow and Rock Dove) and localized (Chukar Partridge, Common Peacock, Rose-ringed Parakeet, Common Chaffinch and House Crow). The first and second bird atlas projects (SABAP1, 1987–1991 and SABAP2, 2007–ongoing) demonstrate the change in distributions of these species over two decades. The centre of gravity of Common Myna distribution moved from KwaZulu-Natal to Gauteng, and it has spread several hundred kilometres in all directions from there. Expansion occurred along successive centres of human habitation. Mallards were concentrated mainly in Greater Cape and the Witwatersrand in the 1980s; there are now scattered records from all provinces of South Africa, with clusters around Pietermaritzburg, East London, Port Elizabeth, Bloemfontein, Nelspruit and the Garden Route. Common Starling continued a steady northeastward expansion into the Free State, KwaZulu-Natal and Gauteng. House Sparrow was ubiquitous during the first bird atlas, and this has not changed. The abundance of Rock Dove increased with little range change.

The only feral population of Chukar Partridge is on Robben Island, where it has little impact and is not a conservation concern. Feral populations of Common Peacock are being reported by citizen scientists, from dispersed localities. Rose-ringed Parakeets increased in Gauteng and Greater Durban, with scattered records elsewhere. 120 years after its introduction, Common Chaffinch remains confined to small areas of the Cape Peninsula. House Crow populations in Cape Town and Durban have been brought under control. 

Read 3108 times Last modified on Tuesday, 03 May 2016 12:30

General News Updates

2019 National Symposium on Biological Invasio…

26-02-2019

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

22-01-2019

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

04-09-2018

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?

01-03-2018

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

28-02-2018

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

25-01-2018

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