What began as a bizarre symbol of excess in a drug lord’s private zoo has turned into one of South America’s most unusual environmental crises. Deep in Colombia’s river systems, hundreds of hippos, descendants of animals once imported illegally by Pablo Escobar, now roam freely, far from their native Africa.
Their numbers have surged over the decades, transforming them from a curiosity into a growing ecological and public safety concern.
Now, Colombian authorities have approved a controversial plan to kill up to 80 of these animals, igniting debate between conservationists, scientists, and animal rights activists over what should be done with Escobar’s unlikely and dangerous legacy.
How did hippos end up in Colombia?
In the 1980s, Escobar built a lavish estate known as Hacienda Nápoles, complete with a private zoo filled with exotic animals imported from different parts of the world.
Among these were four African hippos, a species completely foreign to South America. At the time, the animals were simply part of Escobar’s extravagant display of wealth and power, with little thought given to the long-term consequences.Following Escobar’s death in 1993, Colombian authorities seized the estate and relocated many of the animals to proper zoos. However, the hippos were left behind because transporting them was considered too difficult and dangerous.
Over time, they escaped into nearby rivers and wetlands, particularly 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 unexpected rate and gradually expand their territory far beyond the original estate.
Why are the hippos being killed?
The decision to cull the hippos is rooted in growing environmental and safety concerns.
Over the years, the population has increased dramatically, with estimates suggesting there are now more than 150 hippos roaming freely in Colombia. Without intervention, scientists warn that this number could continue to rise rapidly, potentially reaching several hundred in the coming decades.These animals are not just multiplying, they are also altering the ecosystems they inhabit. Hippos spend much of their time in water, and their waste significantly 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 a growing risk to human communities. Hippos are known to be highly territorial and can be extremely aggressive, especially when they feel threatened.
As their range expands, encounters with villagers, farmers, and fishermen have become more frequent, raising concerns about potential injuries or fatalities. Authorities argue that culling a portion of the population is a necessary step to prevent the situation from escalating further.
Why not relocate or sterilise them?
Over the past decade, Colombia has explored several alternative methods to control the hippo population, but each has proven difficult to implement on a meaningful scale.
Sterilisation efforts, for instance, require capturing and sedating massive, unpredictable animals, followed by complex surgical procedures. This process is not only risky for both humans and animals but also extremely expensive, limiting how many hippos can be treated each year.Relocation has also been considered, including proposals to send some of the animals to sanctuaries abroad. However, moving hippos across continents presents logistical, financial, and health challenges.
There are concerns about the potential spread of diseases, as well as the stress and danger involved in transporting such large creatures. Returning them to Africa is particularly unfeasible, as they no longer belong to a natural population and could disrupt ecosystems there as well.Containment is another challenge. The hippos have already spread across a wide geographic area, making it nearly impossible to confine them without extensive and costly infrastructure.
As a result, officials have concluded that these alternatives, while more humane in theory, are not sufficient to address the scale and urgency of the problem.
A growing ecological dilemma
The presence of hippos in Colombia highlights a broader issue of invasive species and the unintended consequences of human actions. Unlike native wildlife, these animals have no natural role in the local ecosystem, which means their impact can be disproportionately disruptive.
Their feeding habits, movement patterns, and waste production all contribute to environmental changes that native species are not adapted to handle.Scientists warn that if the population continues to grow unchecked, the ecological damage could become more severe and potentially 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 the hippos are thriving precisely because the environment suits them so well, making their removal both urgent and difficult.
Public backlash and ethical concerns
The plan to kill dozens of hippos has sparked strong reactions across Colombia and beyond. Animal rights activists argue that the animals are innocent victims of human decisions made decades ago and should not be punished for simply surviving and reproducing.
For many, the idea of killing healthy animals feels ethically troubling, especially when alternative solutions, however challenging, still exist.There is also a cultural dimension to the debate. In some regions, the hippos have become an unexpected attraction, drawing tourists and generating income for local communities. For residents who have grown accustomed to their presence, the animals are no longer just an environmental problem but also a part of the local identity.
This has created a divide between those who prioritise ecological preservation and safety, and those who advocate for coexistence and humane treatment.
Escobar’s strangest legacy
Decades after his death, Pablo Escobar’s influence continues to shape Colombia in unexpected ways. The hippos he once kept as symbols of wealth have evolved into a real-world challenge that blends environmental science, public policy, and ethics. What started with just four animals has grown into a population that is now impossible to ignore.Colombia’s decision to cull part of the herd reflects the difficult choices governments sometimes face when dealing with problems created in the past. It is a reminder that actions taken for short-term gain can have long-lasting consequences, and that managing those consequences often involves complex trade-offs with no easy answers.
