Creatures on the outer edges of our perceivable domain exist in this gray area between presence and absence. We typically interact with fast-living creatures in spontaneous vignettes. We are momentarily aware of a fly zipping by our ear, and reach out an arm to wave it away. They can hardly be considered proper social experiences, since we rarely process them quickly enough to react.
But what is this sliver of time to an organism that perceives time slower than us? One way scientists determine the ‘speed,’ or temporal resolution that different species are living is by determining a creature’s Critical Flicker Frequency (CFF).1 A more well known name for this phenomenon is ‘persistence of vision;’ it is the point which flickering light stimuli becomes so fast the observer perceives it as a steady, continuous light. We know this as the visual phenomenon that grants the perception of motion to flickering images, making our world of film possible. A human's CFF is 60Hz2, a pigeon's is 100Hz3, and a dragonfly's is 300Hz.4