"After decades of steady environmental degradation in Xochimilco, Mexico wanted to know how many axolotls remained in the species’ last stronghold. Axolotls were of deep cultural importance, a feature of the region’s traditional diet and cosmology. And laboratory biologists all over the world, who for more than a century had used axolotls to study tissue regeneration, worried that their animals were becoming inbred, without a wild population from which to draw new bloodlines."

https://www.nytimes.com/2023/12/05/science/mexico-axolotl-biology.html