Some 350 exotic species introduced into Argentina's ecosystems at different times are causing serious changes to the environment, warns the local affiliate of the World Wildlife Fund (WWF). The problem involves animals such as beavers, starlings, fish species like the carp, and also plants, such as the black acacia, originating from North America. These are all species that reproduce rapidly and jeopardize the development of Argentina's native flora and fauna.

Law prohibits the introduction of species into Argentine territory, but it is difficult to prevent, given the country's extensive borders, and the challenges of containing those that have already arrived as they continue to grow, says the 'Fundación Vida Silvestre.'