What started as a bizarre symbol of excess in a drug lord’s private zoo has turned into one of South America’s most bizarre environmental crises. Deep in Colombia’s river systems, hundreds of hippos, descendants of animals illegally imported by Pablo Escobar, now roam freely far from their native Africa.
Their numbers have risen over the decades, turning them from a source of curiosity into a growing environmental and public safety concern.
Now, Colombian authorities have approved a controversial plan to kill up to 80 of the animals, igniting debate among environmentalists, scientists and animal rights activists over what to do with Escobar’s unpredictable and dangerous legacy.
How did hippos end up in Colombia?
In the 1980s, Escobar built a luxury estate known as Hacienda Napoles, complete with a private zoo filled with exotic animals imported from different parts of the world.
Among these were four African hippopotamuses, a species completely alien to South America. At the time, the animals were merely part of Escobar’s extravagant display of wealth and power, with little thought given to the long-term consequences.After Escobar’s death in 1993, Colombian authorities took over the farm and transferred many of the animals to appropriate zoos. However, the hippos were left behind because transporting them was too difficult and dangerous.
Over time, they escaped to nearby rivers and wetlands, especially the Magdalena River Basin. The region’s warm climate, abundant water, and lack of natural predators created ideal conditions for the animals to thrive, allowing them to reproduce at an unpredictable rate and gradually expand their territories far beyond their original area.
Why are hippos killed?
The decision to cull hippos is due to growing environmental and safety concerns.
Over the years, their population has increased dramatically, and it is estimated that there are now more than 150 hippopotamuses roaming freely in Colombia. Without intervention, scientists warn that this number could continue to rise rapidly, potentially reaching several hundred in the coming decades.Not only are these animals multiplying, they are also changing the ecosystems in which they live. Hippos spend most of their time in the water, and their waste dramatically changes the chemical composition of rivers and lakes.
This can reduce oxygen levels and harm aquatic life, creating ripple effects throughout the ecosystem. In addition, they compete with native species for food and habitat, putting pressure on animals that are already part of Colombia’s delicate ecological balance.There is also an increasing risk to human societies. Hippos are known to be very territorial animals and can be very aggressive, especially when they feel threatened.
As its range expands, encounters with villagers, farmers and hunters have become more frequent, raising concerns about possible injuries or deaths. The authorities say that executing part of the population is a necessary step to prevent the situation from worsening further.
Why aren’t they transferred or sterilized?
Over the past decade, Colombia has explored several alternative methods to control hippo populations, but each has proven difficult to implement on a large scale.
For example, sterilization efforts require the capture and anesthesia of large, unpredictable animals, followed by complex surgical procedures. This process is not only risky for both humans and animals, but it is also very expensive, limiting the number of hippos that can be treated each year.Relocation has also been considered, including proposals to send some animals to reserves abroad. However, transporting hippos across continents presents logistical, financial and health challenges.
There are concerns about the potential spread of disease, as well as the stress and danger involved in transporting such large creatures. Returning them to Africa is not particularly possible, because they no longer belong to the natural population and could disrupt ecosystems there as well.Containment poses another challenge. Hippos have already spread across a wide geographic area, making them nearly impossible to trap without extensive and expensive infrastructure.
As a result, officials have concluded that these alternatives, although more humane in theory, are insufficient to address the scale and urgency of the problem.
A growing environmental dilemma
The presence of hippos in Colombia highlights a broader issue of invasive species and the unintended consequences of human actions. Unlike local wildlife, these animals have no natural role in the local ecosystem, meaning their impact can be disproportionately devastating.
Their feeding habits, movement patterns, and waste production all contribute to environmental changes that native species are not adapted to deal with.Scientists warn that if population growth continues unchecked, environmental damage could become more serious and perhaps irreversible. Changes in water quality can affect fish populations, aquatic plants, and even the livelihoods of people who depend on these ecosystems.
What makes the situation particularly complex is that hippos thrive precisely because the environment suits them well, making their removal urgent and difficult.
Public reaction and ethical concerns
The plan to kill dozens of hippos sparked strong reactions throughout Colombia and beyond. Animal rights activists argue that animals are innocent victims of human decisions made decades ago and should not be punished simply for surviving and reproducing.
For many, the idea of killing healthy animals seems morally troubling, especially when alternative solutions still exist, although difficult.There is also a cultural dimension to the discussion. In some areas, hippos have become an unexpected attraction, attracting tourists and generating income for local communities. For residents accustomed to their presence, animals are no longer only an environmental problem, but also part of the local identity.
This has created a division between those who prioritize environmental preservation and safety, and those who call for coexistence and humane treatment.
Escobar’s strangest legacy
Decades after his death, Pablo Escobar’s influence continues to shape Colombia in unexpected ways. Hippos, once kept as symbols of wealth, have evolved into a real challenge that blends environmental science, public policy, and ethics. What started with just four animals has evolved into a community that is now impossible to ignore.Colombia’s decision to cull part of the herd reflects the difficult choices that governments sometimes face in dealing with problems that have arisen in the past. It’s a reminder that actions taken for short-term gain can have long-term consequences, and that managing those consequences often involves complex trade-offs with no easy answers.