Panda
The giant panda exhibits a lifespan of twenty to thirty years in captivity, though wild specimens rarely exceed fifteen. Their survival depends upon an extraordinarily narrow range of environmental conditions: specific bamboo species, particular altitude ranges, and temperatures that fluctuate within prescribed limits.
A single panda requires approximately twelve kilograms of bamboo daily merely to survive, extracting only seventeen percent of the plant's nutritional content. This metabolic inefficiency renders them vulnerable to any disruption in their food supply. Without continuous human intervention, the species would likely face extinction within decades.