Beavers: Patagonia Invaders
Castores La invasion del fin del mundo (original)
Starting with just 20 Canadian beavers in 1940, the island of Tierra del Fuego in southern Patagonia has become dominated by the forest invaders.
Starring Christopher Anderson, Christopher anderson, Pablo kunzle, Marta Lizarralde, Claudio Bertonatti, Mariela Borgnia, Claudio Chehebar, Carlos Garritz, Fernanda Menvielle, Jorge Troisi
It's a documentary and history movie, and has a rating of 7.5 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Australia.