After years of debate, the Government of Colombia advanced with a key measure to address the expansion of hippos, an introduced species that today generates significant environmental impacts.
In this context, the Ministry of Environment announced the implementation of a population control protocol that includes euthanasia as a management tool.
Additionally, the decision comes after multiple failed attempts to relocate the animals to other countries. Therefore, the aim is to curb a growth that threatens to overwhelm the local ecosystems.
An action plan for uncontrolled expansion
The protocol establishes technical procedures for the capture, sedation, and application of euthanasia, prioritizing animal welfare criteria.
Furthermore, the tasks will be carried out by the Regional Autonomous Corporations, which will receive specific resources to execute the plan in the territory.
On the other hand, actions will begin in critical areas such as Isla del Silencio and Hacienda Nápoles, where there is a high density of individuals.
Consequently, around 80 specimens are projected to be intervened in a first stage, with a start planned for the second half of 2026.
A problem accumulated over decades
The presence of hippos in Colombia dates back more than 40 years, when they were introduced without adequate controls.
However, the absence of sustained measures allowed the population to grow rapidly. Currently, more than 160 individuals are estimated to be distributed in different regions.
Additionally, scientific studies warn that without intervention, the number could exceed 1,000 specimens by 2035, driven by an exponential growth close to 10% annually.
In parallel, sightings in new areas such as Barrancabermeja demonstrate the territorial expansion of the species.
How hippo overpopulation affects the environment
The uncontrolled increase of hippos generates multiple ecological impacts. Firstly, these animals modify bodies of water by removing sediments and altering water quality.
Additionally, their presence affects native species that compete for resources or see their habitat transformed. This causes imbalances in the food chains.
On the other hand, the accumulation of organic waste in rivers and lagoons increases eutrophication, reducing the available oxygen and affecting fish and other aquatic organisms.
Moreover, lacking natural predators in the country, their population grows uncontrollably, intensifying these negative effects on the ecosystems.
Challenges for an international solution
The Colombian government explored alternatives for relocation to other countries, contacting seven nations without obtaining positive responses.
In this regard, international restrictions related to CITES regulations complicate the movement of the species between territories.
Furthermore, the willingness of zoos or sanctuaries is not enough, as the approval of the recipient governments is required. As a result, the lack of agreements limited this option. Therefore, the country opted for an internal strategy that allows for quicker action against the problem.
A growing environmental and social challenge
Beyond the ecological impact, the expansion of hippos also poses risks to local communities. Incidents with people and damage to productive activities have been recorded.
Consequently, the control of the species becomes a priority both environmentally and socially. However, the challenge lies in balancing decisions with ethical and scientific criteria.
At the same time, this case highlights the effects of introducing exotic species without long-term planning.
Ultimately, the situation of hippos in Colombia reflects the complexity of managing altered ecosystems and the urgency of taking sustained measures to protect biodiversity.
