Squirrel
The squirrel's persistence manifests primarily in its relationship with food storage. A single grey squirrel may cache up to 10,000 nuts annually, each buried in a separate location across territories spanning several hectares. This behaviour, known as scatter hoarding, demonstrates a commitment to future planning that borders on the pathological.
However, squirrel memory proves imperfect. Studies indicate that squirrels fail to recover approximately 74 percent of their cached nuts, inadvertently becoming one of nature's most prolific tree planters. This represents persistence undermined by fundamental competence issues. The squirrel tries remarkably hard, invests considerable effort, yet achieves only partial results. One might characterise this as enthusiastic inefficiency.
Death
Death's persistence operates on an entirely different scale of commitment. Having commenced operations approximately 3.8 billion years ago with the emergence of the first living organisms, death has never taken a holiday, never experienced staff shortages, and never once failed to follow through on a scheduled appointment. This represents a track record of absolute persistence unmatched in the natural world.
Where squirrels occasionally forget their caches, death forgets nothing. Every organism that has ever lived has been processed through death's systems with 100 percent efficiency. The estimated 117 billion humans who have ever existed have each received death's personal attention, alongside quadrillions of other creatures. This is not mere persistence; it is persistence elevated to cosmic law.