In October 1982, the gates of the Itaipu River were closed by Paraguay and Brazil, initiating the filling of a reservoir that would soon become the site of the world's largest dam. This process triggered an urgent operation to rescue thousands of animals from the encroaching waters.

The scale of the dam project necessitated a significant environmental undertaking to prevent widespread animal loss. Teams worked to relocate numerous species to safer habitats before the reservoir's water levels rose to their full capacity. The effort highlighted the environmental challenges associated with large-scale infrastructure development.

The Itaipu Dam, situated on the border between Brazil and Paraguay, was a monumental engineering feat. Its construction and subsequent filling of the reservoir had a profound impact on the local ecosystem, prompting measures to mitigate the ecological consequences. The animal rescue mission was a critical component of this mitigation strategy.