The Lake Pátzcuaro salamander is only found in a single lake in Mexico, with an estimated population of less than 100 in the wild. For 150 years, nuns in a nearby convent have been raising a population in captivity — keeping the species alive, but also making them into "cough medicine".

The Mexican mole lizard digs intricate tunnels that run below the surface of the soil. To regulate its body temperature, the mole lizard moves to tunnels at different depths — it spends cooler mornings near the surface and as the day heats up, it moves deeper and deeper below ground.