Their biology reflects the dramatic altitude and climate but not the multi-million-year isolation that characterizes the tepuis.

The tepuis are, in global context, genuinely exceptional — a combination of ancient rock, extreme erosional isolation, high altitude, constant moisture, and geological history that creates a situation with no precise parallel anywhere else on Earth.

This is worth saying plainly: there is nothing quite like Roraima and its neighboring tepuis anywhere in the world.

The specific combination of factors that produces a 2-billion-year-old sandstone plateau surrounded by 400-meter vertical cliffs hosting an ecosystem with 35-50% endemism rates above a major tropical lowland — this combination is unique.

The uniqueness is not a claim of superlative rarity made for dramatic effect.