In 1971, eleven wild sheep were released into the Teide National Park on Tenerife, Canary Islands. Over the following decades, the sheep population grew and began to negatively impact the park’s native flora. Their presence has become a significant ecological concern for the Teide National Park. Originally introduced for hunting purposes, the animals have thrived in the environment. The long-term consequences of this introduction are now being felt as the sheep disrupt the delicate balance of the ecosystem. Park authorities are now grappling with managing the growing sheep population to protect the park’s biodiversity. The incident highlights the potential dangers of introducing non-native species, even for seemingly controlled purposes.