One of the most special things about blue-tongue lizards is that they’re not just passing through. In the wild, when conditions are right, blue tongues can live 20 years or more, with some thought to reach closer to 30 years in safe, undisturbed habitats. That means the blue tongue you spot today could still be sharing your garden decades from now, sunning itself in the same warm patch, patrolling for snails, and watching generations of plants come and go.