A second is a second. A photon arrives at the retina at the speed of light regardless of the organism that intercepts it. The physical world does not slow down for dragonflies or speed up for sea turtles. But the speed at which different animals process visual information varies by an order of magnitude. A dragonfly detects over 200 flashes per second as distinct events. A human perceives about 60 flashes per second before they blur into continuous light. A deep-sea fish may see 15.
Published in Nature Ecology and Evolution, Haarlem and Healy at Trinity College Dublin and the University of Galway measured critical flicker fusion rates across 237 animal species. The speed of visual processing is predicted by ecological pace of life: flying species perceive time roughly twice as fast as non-flying species. Pursuit predators see faster than ambush predators. Animals in bright environments see faster than those in darkness.
The structural insight is about the subjectivity of temporal resolution. The same physical second contains different amounts of visual information for different organisms. A dragonfly experiences a second as roughly three to four times more visually detailed than a human does. Not because the world is different — the photons are the same — but because the sampling rate is different. The dragonfly's nervous system takes more snapshots per unit time, and each snapshot is a moment of experience.
This means there is no single “present moment” in nature. The present is a window whose width depends on the sampling rate of the observer. For a fast-perceiving predator, the present is narrow and information-dense. For a slow-perceiving organism in the deep sea, the present is wide and information-sparse. The same physical event — a prey item moving across the visual field — is a slow, continuous trajectory for the predator and a blurred jump for the prey. Ecology does not just shape what organisms see. It shapes when they see it.