A hippo swims in the Magdalena river in Puerto Triunfo, Colombia, Wednesday, Feb. 16, 2022. Colombia's Environment Ministry announced in early Feb. that hippos are an invasive species, in response to a lawsuit against the government over whether to kill or sterilize the hippos that were imported illegally by the late drug lord Pablo Escobar, and whose numbers are growing at a fast pace and pose a threat to biodiversity. (AP Photo/Fernando Vergara)