> The thriving beaver population of Tierra del Fuego (another place Thie has studied) is descended from beavers brought to Argentina from Canada’s Saskatchewan River.

They've been trying for years to get rid of them, since they are destroying the native forests. [0][1][2][3]

[0] https://es.mongabay.com/2023/06/castor-invasor-plaga-que-arr...

[1] https://www.infobae.com/tendencias/2023/06/06/castores-invas...

[2] https://www.telam.com.ar/notas/202011/536780-castores-tierra...

[3] https://www.scidev.net/america-latina/news/con-trampas-errad...