and wild populations have grown to steadier levels since. Conservation breeding and release programs are “a long-term process, and you need to introduce a lot of animals,” Comizzoli said.

The popular salamanders are nearly extinct in the wild, where they are confined to a small system of canals in Mexico City.

Mission Critical on August 28 at 8 p.m. ET on Nat Geo WILD to follow their development at three breeding centers. I crouch down low in the grass to get a closer look at the animal lurching toward me.

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