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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

Marsh frog

Pelophylax species

Common name:

Marsh frog

Scientific name:

Pelophylax species

Alternative common names:

Edible frog, pool frog, Sanglier D'Eurasie (French), Jabalí (Spanish). 

The marsh frog is the largest species of true frog native to Europe and is found in deep ponds, lakes, rivers and around streams across the continent. The diet of the marsh frog consists of dragonflies and other insects, spiders, earthworms, and slugs. Larger frogs also eat small rodents and sometimes smaller amphibians and fish.

Additional Info

  • Where does this species come from?


    What is its invasive status in South Africa?

    NEMBA Category 1b.

    Where in South Africa is it a problem?

    Western Cape

    How does it spread?

    Dispersed along waterways at original site.

    Why is it a problem?

    It’s quite voracious and in fish ponds, it eats small fishes and often eats conspecific and other amphibians, as well as reptiles and even small birds and rodents.

    What does it look like?

    Description: Marsh frogs can grow to 13 cm or more. It’s a robust, warty frog with a wide mouth and close-set eyes; long hind legs with heels extending beyond head; the metatarsal tubercle is small with a low profile. It is variable in colouration but typically has a brown/grey dorsal surface with greenish tinge and green/olive on back with dark spots. Thighs are striped/spotted greyish/white. It has dark grey vocal sacs, unlike the Edible frog (light grey) or Pool frog (white).The dominant colour can be bright green or (rarely) blue. Females do not possess vocal sacs or develop metatarsal tubercles. The Marsh frog can be mistaken for other water frogs .The Edible frog has a variably coloured dorsal stripe, narrower gape, light grey vocal sacs and its slightly shorter legs reach to between eyes and nares .Pool frogs are much smaller, have short legs reaching only behind the eyes and the males have white vocal sacs. Marsh frog males also develop a yellow facial colouration in the breeding season Habitat: These aquatic animals prefer large, deep ponds, lakes and rivers and are tolerant of slight salinity as found in upper estuarine conditions. Requiring insolation they are usually found gregariously sunning on south-facing banks adjacent to the water body or on floating rafts of vegetation on the water body. On disturbance, they leap into the water with a characteristic. Breeding: Breeds in the early spring, when mating takes place in calm, shallow pools of water. The female marsh frog lays around 1,000 eggs in a sticky cluster that floats on the water's surface, known as frogspawn. Once developed the marsh frog tadpoles emerge into the water where they are fully aquatic until they metamorphose into adult marsh frogs and are able to leave the water.

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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