Does Time Feel the Same
to Every Living Thing?
From dragonflies living in ultra-slow motion to starfish for whom the world is a perpetual blur — the science of animal time perception is stranger, and more profound, than you think.
We carry our sense of time everywhere we go — in alarm clocks, calendars, the anxious feeling that an afternoon is slipping away. But here is the question science has only recently begun to take seriously: does time actually feel this way to a housefly? A crow? A dolphin? The answer, it turns out, is a resounding no — and the details are nothing short of extraordinary.
The passage of time is not a universal experience. Across the animal kingdom, creatures inhabit radically different temporal worlds, shaped by the speed of their neurons, the metabolism of their bodies, and the evolutionary pressures that sculpted their minds. To understand how other animals experience time is to begin dismantling one of the most persistent illusions of human life: that our sense of time is simply the way time is.
The Speed of the World: Visual Time Perception
The most measurable dimension of animal time experience is visual — how fast a creature can process the world around it. Scientists measure this using a phenomenon called Critical Flicker Fusion Frequency (CFF): the rate at which a flickering light becomes indistinguishable from a steady one. The higher the frequency an animal can detect, the finer the temporal resolution of its experience.
Critical Flicker Fusion Frequency across species — University of Galway study of 138 animals (2022)
A dragonfly, perceiving the world at 300 frames per second, experiences what we might call bullet time — every movement of prey unfolding in granular slow motion. A blowfly’s ability to dodge a rolled-up newspaper is not a miracle of reflexes so much as a miracle of time: in its temporal frame, the newspaper descends with glacial slowness. Meanwhile, a crown-of-thorns starfish, processing at less than one frame per second, moves through a world that is essentially a still photograph interrupted by the occasional smear of motion.
For some animals, the world moves in slow-motion all the time — not as a cinematic trick, but as the fundamental texture of reality.
SciShow / University of Galway Research, 2022The driving forces behind these differences are body mass and metabolic rate. Research published in Animal Behaviour confirmed that smaller animals with faster metabolisms consistently perceive time at finer resolutions. A mouse does not simply think faster than an elephant — it inhabits a different temporal universe. The energetic cost is real: maintaining fast visual processing requires rapid neural recharging, which is expensive. Animals that don’t need split-second reactions — an herbivorous starfish waiting for a coral polyp to stay put — have no evolutionary reason to spend that energy.
The swordfish with a built-in time enhancer
Dogs see television screens as a series of flickering images, not smooth video — because their CFF rate (70–80 Hz) exceeds the refresh rate of many older TV screens. Your dog may be watching something closer to a strobe-light slideshow than a film.
Perhaps the most astonishing anatomical finding in this field involves swordfish. A specialised heating organ — embedded in the muscle tissue next to the eyes — continuously warms the retina and surrounding brain tissue up to 10–15°C above the cold water the fish hunts in. Warming the retina dramatically improves its temporal resolution, giving the swordfish a finer-grained perception of fast-moving prey. This is not a behaviour the fish consciously initiates; it is a fixed anatomical adaptation, always on — evolution’s solution to the problem of hunting in cold, dark water. The lesson is striking regardless: evolution did not just shape what animals perceive; in some lineages, it built dedicated hardware to enhance it.
Even within a single species, time perception shows some plasticity. Some research suggests that athletes who track fast-moving objects — such as goalkeepers in soccer — may develop faster visual processing, though robust peer-reviewed evidence on CFF differences in athletes remains limited. Coffee has been reported to offer a small boost to human flicker-detection, though this too awaits thorough confirmation. The takeaway is directionally interesting: the boundary between fast and slow temporal worlds may be more permeable than we assume.
Beyond the Senses: Do Animals Know What Time Is?
Visual time perception is only one dimension of this question. The deeper puzzle is whether animals have any grasp of time as an abstraction — whether they can hold the past and future in mind, not just react to the present.
For decades, the scientific consensus held that this capacity was uniquely human. The so-called Mental Time Travel (MTT) hypothesis proposed that only humans can mentally project themselves backwards into remembered episodes or forwards into imagined futures. That consensus is now crumbling.
The scrub jay’s remarkable memory
Groundbreaking research by Professor Nicola Clayton at Cambridge turned the study of animal time on its head. Western scrub jays — members of the corvid family — cache food in hundreds of locations. Crucially, they don’t just remember where they hid things. They remember when, and they adjust their retrieval accordingly: if worms were cached four hours ago, they go for the worms; if days have passed, they know the worms have spoiled and head for the peanuts instead. These birds carry a timeline of the past inside their minds, and they act on it flexibly.
More strikingly, Eurasian jays have been shown to cache specific foods they appear to anticipate wanting later — behaviour that looks forward-oriented rather than habit-driven. Researchers note, however, that the interpretation remains contested: for the memory to qualify as truly episodic, the “when” must be explicitly encoded rather than inferred from a decaying memory trace. The debate is live. What is not in dispute is the behaviour itself — these birds act as if they hold a model of their own future states. A chimpanzee in a Swedish zoo offers another striking case: Santino, as he became known, was documented over many years calmly collecting and caching stones each morning — which he then hurled at visitors hours later, in an entirely different, agitated emotional state. It remains one of the most carefully documented instances of apparent future planning in a non-human animal, though notably rare — no other captive chimp has been observed doing the same.
Some animals appear to mentally travel three chess moves into the future — holding a sequence of future states in mind and working backwards to the action required now.
On New Caledonian Crows — A Murder of Crows, PBS NatureHoneybees and the episodic timestamp
If corvids and great apes seem unsurprising candidates for time awareness, consider the honeybee. Research published in the Journal of Experimental Biology demonstrated that bees can form what researchers called “circadian timed episodic-like memory” — linking not just what happened and where, but when during the day it happened. Bees trained to visit different flowers at different times of day can switch their preferences fluidly based on the time of day they’re tested. They don’t just navigate space; they navigate time. For an animal with fewer than one million neurons, this is humbling.
Dolphins and the question of mental time travel
Dolphins present a compelling but still-open case. Researchers at the University of Southern Denmark, Johns Hopkins, and the Max Planck Institute are actively investigating whether dolphins — alongside bats and parrots — can sense time, use past experience to plan future actions, and communicate that information socially. The project, funded by the Human Frontiers Science Program, represents the most rigorous ongoing attempt to test mental time travel in non-primate species. Results are pending, but the researchers hypothesise that dolphins and parrots, given their complex cognition in other domains, will show core elements of temporal awareness — possibly on different time scales and levels of complexity than great apes.
Animal “episodic memory” studies cannot confirm subjective re-experience — we can’t ask animals what remembering feels like. What we can measure is flexible, what-where-when behavioural memory. The subjective question remains open.
Researchers note an important caveat: the complex cognitive processes involved in conscious time awareness — the kind that allows a human to feel that they’re remembering — require the cortex and hippocampus. More primitive time-associated behaviours operate through the amygdala. Whether any non-human animal truly experiences the passage of time as an inner sensation, or merely tracks it behaviourally, remains one of the most contested questions in cognitive science.
The Body as a Clock: Circadian Rhythms Across Species
Every living organism — including single-celled bacteria — contains some version of a biological clock. The circadian system, driven by feedback loops of clock genes like period and cryptochrome, orchestrates daily rhythms of sleep, hormones, metabolism, and behaviour across almost all life on Earth.
What is remarkable is how conserved these mechanisms are. The clock genes found in a fruit fly are recognisably similar to those in a human. The molecular architecture of time-keeping evolved once, deep in evolutionary history, and was preserved across hundreds of millions of years. In this sense, all animals share a common clock — but they set it differently, and their experience of what it governs varies enormously.
In birds, the circadian system is unusually complex — involving the pineal gland, retinae, and multiple brain regions simultaneously. This complexity may be part of what makes corvids such sophisticated timekeepers. Food-caching birds don’t merely remember where they stored food; their memories are tagged with circadian markers — morning versus afternoon, this week versus last week — in a system that functions like an internal calendar.
What This Means: Fragments of a Larger Picture
The emerging picture from neuroscience and comparative cognition is neither the old anthropocentric view (time consciousness is uniquely human) nor a naive egalitarianism (all animals experience time the same way). It is something more interesting: a vast, graduated landscape of temporal experience, shaped by ecology, physiology, and evolutionary history.
Dragonflies and blowflies experience a world of extreme temporal resolution — but almost certainly without any reflective awareness of time as a concept. Corvids and great apes appear to hold personal pasts and imagined futures in mind — though whether this involves anything like human subjective experience remains unknown. Honeybees tag their memories with timestamps without possessing anything we’d call consciousness. Starfish drift through a reality so temporally blurred that our notion of “a moment” would be meaningless to them.
And humans? We occupy our own particular niche in this landscape — not at the top of a hierarchy, but at one node in a web. We have elaborated temporal cognition into language, history, calendar systems, and existential anxiety about mortality. We are perhaps the only animals that know, abstractly, that we are going to die — and spend considerable cognitive energy thinking about it. Whether this makes us richer or poorer temporal beings than the dragonfly is a question worth sitting with.
There is a whole world of detail out there that only some animals can perceive — and it is fascinating to think of how they might perceive the world differently to us.
Andrew Jackson, Trinity College Dublin — Animal Behaviour StudyThere is also a practical dimension to this research that researchers are beginning to take seriously: if animals experience time — including the anticipation of future suffering — then the way we confine, transport, and manage animals may cause distress that extends far beyond the physical moment of restraint. A creature that can model the future is a creature that can dread it.
Time, it seems, is not the steady river we imagine it to be — the same flow for every creature that swims in it. It is more like a medium whose texture and speed vary wildly depending on the nervous system doing the perceiving.
The fly on your wall is not living a smaller version of your day. It is living in a different time entirely — one in which your hand moves toward it with the terrible slowness of a dream, giving it ample opportunity to escape. And somewhere in cold ocean water, a swordfish hunts with a retina permanently warmed by evolution’s own engineering, perceiving motion the rest of us would miss entirely.
We share a planet with creatures for whom time bends in ways we can barely imagine. The least we can do is pay attention.
