The Colombian government wants to spend millions of dollars to slaughter a herd of hippos because they don’t fit a tidy, colonialist definition of what "nature" should look like. They call it a culling. They call it environmental protection. I call it a failure of imagination and a rejection of biological reality.
For decades, the narrative around the "Cocaine Hippos"—those oversized descendants of Pablo Escobar’s private zoo—has been framed as an ecological disaster waiting to happen. The logic is simple, lazy, and wrong: these animals aren't from here, so they must go. We are told they are aggressive, they pollute the Magdalena River with their massive waste, and they threaten the local manatee population.
But if you look past the sensationalist headlines about "invaders," you find a much more complex truth. These hippos are not a mistake. They are a functional replacement for the massive creatures we already killed off thousands of years ago.
The Myth of the Pristine Wilderness
The primary argument for the cull rests on the idea of "native" versus "invasive" species. This is a binary trap. Biologists often treat ecosystems like museum exhibits, frozen in time, where every piece must remain exactly where it was in 1491.
The reality is that South America used to be home to a wide array of "megafauna"—giant ground sloths, massive llama-like creatures, and gomphotheres (extinct elephant relatives). Humans wiped them out. When those large herbivores disappeared, the ecosystem lost the engines that moved nutrients from the water to the land and kept vegetation in check.
By thriving in the Magdalena River, these hippos are performing a role that has been vacant for 10,000 years. Research published in Proceedings of the National Academy of Sciences (PNAS) suggests that the Colombian hippos actually restore ecological functions lost during the Late Pleistocene extinctions. Their diet and lifestyle mirror those of extinct South American giants more closely than any living native species.
We aren't witnessing an invasion. We are witnessing a restoration.
The Waste Management Fallacy
Critics love to talk about hippo dung. They claim the sheer volume of waste being pumped into the river system will lead to eutrophication—oxygen depletion that kills fish.
Let’s look at the actual scale. We are talking about roughly 170 to 200 animals in a massive, sprawling river basin. Compare that to the industrial runoff, untreated human sewage, and mercury from illegal mining that actually chokes Colombian waterways. Targeting the hippos for water quality issues is like trying to fix a sinking Titanic by throwing a single ice cube overboard.
In sub-Saharan Africa, hippo waste is a fundamental driver of the food chain. It transports silicon and nitrogen from terrestrial grasses into the aquatic ecosystem, feeding insects and fish. To claim this same process is "pollution" in Colombia is a massive double standard based on nothing but geography.
The Massive Cost of a Moral Panic
The plan to cull 80 hippos is a logistical nightmare and a financial black hole. Sterilizing a single hippo costs upwards of $10,000 to $20,000. Moving them is even more expensive. Culling them—killing them in the wild—requires heavy weaponry, specialized transport, and deep-pit burial to prevent the spread of disease from decaying carcasses.
Colombia is a country with pressing socio-economic challenges. Using taxpayer money to hunt down a popular, charismatic species that has become a cornerstone of local tourism in places like Puerto Triunfo is a political suicide mission masquerading as science.
Local communities don’t want them gone. The people living alongside these animals have adapted. They’ve built an entire economy around "hippo tourism." When the government talks about culling, they aren't just killing animals; they are killing the livelihoods of villagers who have found a way to coexist with Escobar’s unintended legacy.
The Danger of "Safe" Conservation
Conservationists fear the hippos because they are unpredictable. They are large, territorial, and fast. Yes, they can be dangerous. But so are jaguars. So are caimans. We don't advocate for the systematic eradication of every predator that poses a risk to humans. We manage them.
The push to kill the hippos stems from a desire for "safe" conservation—a version of nature that is predictable and stays within the lines we draw on a map. But nature doesn't care about maps. The hippos have found a niche where they are healthy, breeding, and filling a functional gap in the food web.
If we were truly committed to the environment, we would be studying how these animals are changing the landscape for the better, not sharpening the knives. We would be looking at how their grazing patterns create firebreaks or how their trails create new habitats for smaller amphibians.
Stop Playing God with a Broken Clock
We have spent centuries breaking ecosystems. Now, when nature tries to heal itself in a way that looks "weird" to us, our first instinct is to destroy it.
The Colombian hippos represent a rare phenomenon: a successful accidental rewilding. They are proof that life finds a way to adapt even after we have stripped the land of its original giants. To cull them is to admit that we prefer a sterilized, empty landscape over a vibrant, evolving one.
Stop the cull. Stop the moralizing. Let the hippos stay.
The Magdalena River isn't being ruined; it's finally waking up after a ten-millennium nap.
