The unusual accident — the first of its kind in a South American nation where hippos aren't native — was just the latest sign that Colombia's so-called "cocaine hippos" are becoming a big problem.

A wildlife expert has accused officials responsible for drug lord Pablo Escobar’s private zoo of hippos of secretly planning to kill the animals. The hippos bred in the wild after escaping the ...

A pushback from environmentalists prevented further culling. Colombia continues to grapple with the “cocaine hippo” vexation. An inventive film from the Dominican Republic provides an ...