Skip to content
NatureHQ

Behaviour and cognitionbehaviour

Ambush and pursuit

The question is not fast or patient. It is how small you can make the gap before you commit — and what happens when the prey turns.

Both are answers to the same problem: closing the distance before the prey leaves. The ambusher solves it by not being detected until the gap is already small. The pursuer solves it by covering the gap faster than the prey can. Neither is better, and most predators do some of each.

Framing this as two kinds of predator obscures what it is actually about, which is a single quantity: the distance at which the attack begins. Everything else follows. An ambusher works to make that distance tiny, spending its effort on concealment, position and stillness, and then needs an explosive first movement over a very short range. It also needs somewhere worth waiting, which is a real constraint — an ambush site that prey do not visit is worthless, and the animal is committed to it. A pursuit predator accepts a larger starting distance and pays for it with endurance, tracking, and the ability to keep adjusting as the prey turns. What has changed in the last decade is the evidence, and it changed the pursuit half considerably. When wild cheetahs were finally collared and hundreds of complete runs recorded, they turned out to spend very little time near their maximum speed, and what separated a successful hunt from a failed one was deceleration and turning rather than velocity. Matched measurements from lions, zebra, cheetahs and impala pointed the same way: predators have more of every performance capacity than their prey, and hunts are still routinely lost, because the animal doing the turning gets to choose when to turn. That is the honest version of the arms race — not one side winning, but capabilities matched closely enough that the outcome stays uncertain. The same evidence retired a well-known claim. Cheetahs were long said to break off hunts because they overheat, on the strength of two captive animals stopping on a treadmill at a consistent body temperature. When temperature was measured inside free-living cheetahs it did not rise nearly enough, and the substantial rise came after a successful kill rather than during the chase.

Developed coverage · 44% complete · reviewed 2026-09-03

What this page covers

Both strategies occur across cats, canids, snakes, crocodilians, spiders, fish, raptors and insects. Most predators use elements of both, and the split is a spectrum rather than a pair of boxes.

Often confused with: Speed as the defining property of a pursuit predator, when manoeuvre usually matters more; Ambush as laziness, when it is the more energetically demanding solution per attempt in several species; Strategy as a fixed species trait, when many predators switch by habitat, prey and season

Quick facts

The real variable
The distance at which the attack starts; everything else follows from it
What decides a cheetah hunt
Deceleration and turning, not top speed
The overheating claim
Not supported when temperature was measured in wild cheetahs
Not a species label
Many predators switch between the two by habitat, prey and season

One problem, solved from opposite ends

Both strategies are about the gap between predator and prey when the attack begins.

What each strategy spends its effort on
AspectAmbushPursuit
Attack distanceAs short as possibleLonger, and closed during the attack
Main investmentConcealment, position, stillnessEndurance, acceleration, manoeuvre
Search costLow — the predator barely movesHigh — the predator covers ground
Main constraintNeeding a site prey actually visitNeeding to out-turn something lighter
Typical failureDetected early, or nothing comes pastPrey turns inside the pursuer

The row that surprises people is the third. Waiting is cheap and chasing is expensive, so ambush looks like the economical option — and per unit time it is. Per attempt it frequently is not, because an ambusher may commit its entire day to a site that produces nothing, while a pursuit predator that finds no prey has at least searched a wider area. Neither is better; they fail differently.

Diagram

The same problem, solved from opposite ends

Both are about the gap when the attack begins.

The same problem, solved from opposite endsAmbushSpends effort on concealment and positionFails when detected early, or nothing comesAttack distance: as short as possiblePursuitSpends effort on endurance and manoeuvreFails when the prey turns inside itAttack distance: longer, closed in the runNeither is better. They fail in different ways.Most predators use elements of both, and switch with habitat and prey.
The same explanation in words

Two panels. The ambush panel shows a predator and prey almost touching, with a short dashed line between them: effort goes into concealment and position, the attack distance is as short as possible, and it fails when the predator is detected early or nothing comes past. The pursuit panel shows the same two animals far apart with a long dashed line: effort goes into endurance and manoeuvre, the distance is longer and closed during the run, and it fails when the prey turns inside the pursuer. Neither is better; they fail in different ways, and most predators use elements of both.

What happened when somebody measured whole hunts

The famous cheetah numbers came from a handful of straight-line trials with a lure.

When whole cheetah hunts were finally measured, the animals rarely ran near their maximum speed. What separated a successful hunt from a failed one was deceleration and turning, not how fast the cheetah could go.

Well supported

Good evidence backs this, though some details remain open.

Inertial and GPS telemetry across hundreds of hunting runs by wild cheetahs recorded peak speeds substantially below the species maximum in most runs, with capture success associated with deceleration and lateral acceleration capacity rather than with peak velocity.

Who this applies to
Wild cheetahs in one southern African population, across 367 recorded runs.
Studied in
Acinonyx jubatus
Why we rate it this way, and what the caveats are
Well supportedModerate confidence

Directly measured across many runs with purpose-built instrumentation, which is far stronger than the staged trials the older figures came from. It remains five individuals in one population, and collar-derived speeds carry quantified error.

Caveats

  • This does not lower the cheetah’s maximum speed, which is real. It shows that the maximum is not what the animal is usually doing or what decides the outcome.
  • One population, and habitat openness plausibly affects how much of a hunt is straight-line running.

Still unanswered

  • Whether cheetahs in more open habitats run closer to their maximum, which would make the finding partly a property of terrain.

Last reviewed 2026-09-03

The evidence (2 studies)

How we know

Measuring the whole hunt instead of the top speed

The cheetah’s reputation rests on a maximum speed measured in a handful of straight-line trials. What does the animal actually do when it hunts?

Five wild cheetahs were fitted with custom collars combining GPS with inertial sensors, recording speed, acceleration, deceleration and turning continuously. Three hundred and sixty-seven hunting runs were captured in the field, over natural terrain and against real prey.

What happened

Most runs peaked well below the species maximum. Deceleration exceeded acceleration in magnitude, and hunting success was associated with deceleration and turning performance rather than with peak speed.

What it shows

That cheetah hunting is a manoeuvring problem rather than a pure speed problem. The famous number is real and describes something the animal seldom does — which is a general lesson about capability figures measured under artificial conditions.

What it does not show

It does not lower the cheetah’s maximum speed, which is not in dispute. Five individuals in one population is a small sample, and how much of the result reflects this habitat’s terrain rather than the species is untested.

The controls — what makes this evidence rather than a story
  • Whole runs recorded rather than sampled segments, so a peak cannot be mistaken for a typical value.
  • Collar accuracy quantified independently and reported, since the entire result depends on the speed estimates.
  • Many runs per individual, separating what a cheetah can do from what it usually does.

From Locomotion dynamics of hunting in wild cheetahs

The result generalises past cheetahs, which is why it sits on this page rather than only on a species page. Matched measurements across lions, zebra, cheetahs and impala found predators with higher capacity than their prey on essentially every axis — faster, quicker to accelerate, quicker to decelerate — and prey still escaping regularly, because the animal being chased chooses the moment to turn and the pursuer must react. Superior capability and uncertain outcomes are not in tension once you notice who has the initiative.

The claim that cheetahs stop because they overheat

A reasonable inference from two captive animals, tested forty years later and not supported.

Body temperature measured inside free-living cheetahs did not reach the levels the overheating story requires, and unsuccessful hunts were not hotter. The larger rise came after a successful hunt, not during the chase.

Well supported

Good evidence backs this, though some details remain open.

Continuous body-temperature telemetry in free-living Acinonyx jubatus recorded only modest increases during hunting, insufficient to support thermal limitation of chase duration, with the substantial post-hunt rise associated with successful kills rather than with abandoned pursuits.

Who this applies to
Free-living cheetahs carrying implanted temperature loggers.
Studied in
Acinonyx jubatus
Why we rate it this way, and what the caveats are
Well supportedModerate confidence

A direct test of the specific claim, measuring the quantity the claim is about in the animals the claim is about. The sample is necessarily small, which is why this is well-supported rather than established.

Caveats

  • The older treadmill result is not fabricated: those animals did stop at a threshold. What is questioned is whether a captive cheetah refusing a treadmill is the same event as a wild cheetah breaking off a chase.
  • Few animals could be instrumented, and conditions in hotter parts of the range were not sampled.

Where researchers disagree

  • The 1973 treadmill study found two captive cheetahs stopping at a consistent body temperature of about 40.5 °C, which is the observation the overheating account was built on and is not disputed. What the later work questions is whether a captive animal declining to continue on a treadmill is the same event as a wild cheetah breaking off a chase.

Still unanswered

  • What does end an unsuccessful chase, which the telemetry work does not answer — prey manoeuvre, loss of position and giving up are all candidates.

Last reviewed 2026-09-03

The evidence (2 studies)

The sequence is worth following, because it is a good example of how a textbook fact forms. In 1973 two captive cheetahs were run on a treadmill and stopped at about 40.5 °C, and the authors proposed heat storage as a limit on sprint duration — carefully, as a hypothesis. It became a certainty by repetition. In 2013 temperature loggers were implanted in free-living cheetahs and the actual hunting temperatures were recorded: modest rises, nowhere near the proposed limit, and no difference between hunts that succeeded and hunts that did not. The larger rise did exist, but it came afterwards, following a kill.

The post-hunt temperature rise is real and was probably what made the original inference so persuasive. It happens after a successful kill, and appears to be a stress response tied to feeding and the risk of losing it — not the cause of a chase ending.

Based on Body temperature measured inside free-living cheetahs did not reach the levels the overheating story requires, and unsuccessful hunts were not hotter. The larger rise came after a successful hunt, not during the chase.

Related

How we know

Measuring the temperature the story was about

Cheetahs were said to break off hunts because they overheat, on the strength of two captive animals stopping on a treadmill. Does body temperature actually rise that far during a real hunt?

Temperature-sensitive data loggers were implanted in free-living cheetahs, recording body temperature continuously through successful and unsuccessful hunts under natural conditions.

What happened

Body temperature rose only modestly during hunting and did not approach the levels the overheating account requires. Unsuccessful hunts were not hotter than successful ones. The substantial rise occurred after a successful hunt rather than during the chase.

What it shows

That the overheating explanation is not supported for wild cheetahs. It also explains why the original inference was persuasive: there is a real and substantial temperature rise associated with hunting, and measuring it afterwards would find it.

What it does not show

It does not explain what does end an unsuccessful chase, which remains open. The sample is necessarily small for an implanted-logger study in a threatened species, and the hottest parts of the range were not sampled.

The controls — what makes this evidence rather than a story
  • Continuous recording rather than post-hunt sampling, which is what the original inference had relied on.
  • Successful and unsuccessful hunts compared, since the claim specifically predicts that abandoned hunts should be the hot ones.
  • Free-living animals in natural conditions rather than treadmill running, which is the exposure the claim is about.

From Cheetahs do not abandon hunts because they overheat

Claims about this, checked

Things people have heard, and what the evidence actually supports.

The research behind this page

4 studies, newest first. Each one has a page explaining what it found and what it could not show.

2018Nature

Biomechanics of predator–prey arms race in lion, zebra, cheetah and impala

Predators had higher maximum speed, acceleration and deceleration capacity than their prey, but hunts were usually won or lost on manoeuvre rather than on raw performance, and prey succeeded often by turning inside a faster pursuer.

2013Nature

Locomotion dynamics of hunting in wild cheetahs

Cheetahs rarely ran near their maximum speed.

2013Biology Letters

Cheetahs do not abandon hunts because they overheat

Body temperature rose only modestly during hunting and did not reach the levels the overheating hypothesis requires.

1973American Journal of Physiology

Temperature regulation and heat balance in running cheetahs: a strategy for sprinters?

The treadmill-running cheetahs stored heat rather than dissipating it, and refused to continue at around 40.5 °C, which the authors proposed as a limit on sprint duration.

This page is a stop on a longer route

A guided journey reads several subjects in a deliberate order, with an argument for why one follows another. You can join in the middle.

Where to go from here

Each of these follows from something on this page — a relationship in the evidence, a claim people ask about, or the next mechanism along.

How complete this page is, and what it is still missing

NatureHQ publishes its own gaps. This page is at 44% completeness against what we would call a finished subject, and was last reviewed on 2026-09-03. It carries 2 claims and answers 0 mapped search questions.

  • 3 high-priority search intent(s) not yet covered
  • no research from the last few years is attached — check for newer work
  • The evidence here leans heavily on African large-mammal telemetry, because that is where whole hunts have been instrumented.
  • Aquatic and invertebrate ambush predators are mentioned rather than covered.
  • What actually ends an unsuccessful chase is genuinely unresolved and is stated as such.