By New Jersey Birds - https://commons.wikimedia.org/w/index.php?curid=17747523
Where does this species come from?
Africa
What is its invasive status in South Africa?
NEMBA Category 3.
Where in South Africa is it a problem?
Midlands of KwaZulu-Natal Province, Western Cape Province, Gauteng Province, and Mpumalanga Province.
How does it spread?
Spread via pet trade.
Why is it a problem?
Guineafowl can damage emerging seedlings of agricultural crops.
Sources:
(*) https://en.wikipedia.org/wiki/Helmeted_guineafowl(*) https://ebird.org/species/helgui
(*) https://search.macaulaylibrary.org/catalog?taxonCode=helgui