In Darwin's footsteps

These powerful slow giants not only carry the massive weight of their one and only life shelter; they also have the inner strength to climb the heavy slopes of volcanoes, driven by the reproduction instinct, laying eggs by the lava-heated grounds.
The paradox of such a robust animal, though completely defenseless to the least intruder to its ecosystem, is the testimony of the extreme precision of the evolution and the great fragility of this equilibrium.