The drug kingpin brought four hippos to his estate in the 1980s. Officials estimate that about 170 now roam Colombia, and say the population must be controlled to protect the country’s ecosystem.
Amy Siewe teaches people how to find and euthanize invasive Burmese pythons, which have been so successful at adapting to Florida that they appear here to stay.
A hunting contest has exposed tensions over which animals deserve protection, who gets to define humaneness and how children should be taught about conservation.