How Snakes Walk: Four Ways Slithering Really Works

Snakes do not walk in the usual sense: they have no legs, and move by coordinating their muscles, ribs, and scales to push against the ground or nearby surfaces. This field-guide-style activity explains four common forms of snake locomotion and how to observe them without disturbing a snake; it is not a food recipe, because “snake walk” is not a recognized dish.

Ingredients

1 notebook or a few sheets of paper for recording observations
1 pencil or pen
1 phone or camera, optional, for photographs from a safe distance
1 pair of binoculars, optional, for watching from farther away
At least 20 minutes for a quiet observation session
One safe viewing location, such as a marked trail or a place where a snake is already visible from a distance

These are observation supplies, not food ingredients. You do not need to find a snake to complete the activity: a reputable wildlife video can show the same movement patterns more clearly and without putting you or an animal at risk. Never pick up, corner, touch, or try to coax a wild snake into moving. If you cannot identify the species, treat it as potentially venomous and keep well back.

Instructions

Choose a safe way to observe. Start with a video or a supervised wildlife viewing area. If you happen to see a snake outdoors, stay on the path and keep a generous distance; several metres is a sensible starting point, but local wildlife guidance and the situation matter. Do not approach for a closer photograph. Keep children and pets back, and give the snake an open route to leave. If a snake is inside a building or in a busy area, do not handle it; contact local animal control or a qualified wildlife professional.
Look at the whole body before naming the movement. Notice whether the snake is on open, rough ground, crossing a smooth surface, moving through a narrow gap, or travelling over loose sand. The surface and the space available influence the movement you see. Watch the head, the middle of the body, and the tail in sequence. A snake’s body does not move as one rigid unit: bends travel along its length, while muscles contract and relax in coordinated patterns.
Check for lateral undulation. This is the familiar side-to-side, S-shaped progression used by many snakes, especially when they have irregularities such as grass, stones, roots, or other objects to push against. The snake presses parts of its body against those contact points. Each push sends the body forward while the curves shift along it. In your notes, record where the bends occur and what the snake seems to push against. The motion can look like a series of waves, but the snake is not simply sliding passively: muscular effort and contact with the surroundings help generate forward thrust.
Look for concertina movement in a confined space. When a snake moves through a narrow tunnel, branch gap, or other restricted passage, it may anchor one section of its body, extend another section forward, and then draw the rear portion up. The body alternately lengthens and bunches, much like a concertina being opened and compressed. Note the sequence: a section grips or braces, the front advances, and the rest follows. This is a useful pattern where there is limited room to form broad side-to-side curves. Do not create a narrow enclosure to make a snake demonstrate it; observe only naturally occurring movement or a video.
Distinguish rectilinear movement from slithering curves. Some snakes, notably heavy-bodied species such as boas and pythons, can move with a relatively straight body line. Small sections of the belly lift, shift forward, and set down in succession, while the skin and muscles help the snake gain purchase. The head can advance with little obvious sideways bending. Look closely at the underside only if it is naturally visible in a recording; do not get near a live snake to inspect it. This slow, straight-ahead motion is called rectilinear locomotion, and it is different from the side-to-side waves of lateral undulation.
Watch for sidewinding on loose or hot ground. Sidewinding is especially associated with certain desert snakes. Instead of keeping much of the body in continuous contact with the ground, the snake lifts and places parts of itself in a sequence of angled contacts. The body appears to travel diagonally, leaving a distinctive set of separated tracks in suitable sand. The pattern helps it move over loose ground, where a long, sliding contact could be less effective. Do not assume every snake in a desert sidewinds or that every diagonal track belongs to a snake; look for a clear recording or reliable field interpretation.
Record evidence rather than guessing. Write down the surface, whether the body made wide curves, and whether sections appeared to anchor, lift, or travel straight. Then compare those details with the four movement descriptions above. If the view is brief or obstructed, write “uncertain” rather than forcing a label. Different species can use more than one form of locomotion, and a snake may change its movement when the terrain changes. A short clip may not show enough of the body to identify the pattern confidently.
Finish by letting the animal continue undisturbed. Do not follow a snake into vegetation, block its route, or move objects to expose it. Leave the area as you found it and review your notes later. If you are observing through a screen, pause or replay the clip to compare body position over time. A slow replay can help reveal whether a bend moves down the body, whether the snake is bracing against obstacles, or whether its belly sections advance in sequence.

Tips

Use video when visibility is poor. A clear side view often makes it easier to tell a traveling S-curve from concertina movement. Choose educational footage that shows the animal moving naturally, rather than staged handling.
Do not identify a snake from its movement alone. Several species can use similar patterns, and movement changes with terrain, speed, and circumstance. Treat locomotion as one observation, not a species-identification shortcut.
Avoid the common mistake of calling every movement “slithering.” That word is useful informally, but distinguishing lateral undulation, concertina, rectilinear movement, and sidewinding gives a more precise account of what you saw.
Keep the camera secondary. Zoom in from where you are rather than stepping closer. Never use a stick, food, or another animal to provoke movement for a photograph.

Serving Suggestions

For a useful learning session, make a simple four-column chart with the headings “surface,” “body shape,” “point of contact,” and “likely movement.” Add one observation at a time instead of trying to memorize every detail at once. For example, a snake forming broad curves while pressing against grass stems is consistent with lateral undulation; a snake repeatedly extending and gathering its body in a tight gap suggests concertina movement. Phrase conclusions carefully: “appears consistent with” is better than claiming certainty from a distant glimpse.

This activity also works well as a comparison between a live observation and a reputable video. Ask a partner to describe the motion without naming it, then compare the description with the movement terms. Children should observe with an adult and remain at a safe distance; the goal is to notice how the body moves, not to get close or handle wildlife. If no snake is present, use several short clips and compare how the same body behaves on different surfaces.

Variations

Make it a track-reading exercise. In a suitable video or a documented field example, compare the marks left by sidewinding with the more continuous trail that may accompany other movement. Tracks can be incomplete or altered by wind, footsteps, or other animals, so use them as clues rather than proof. Do not trample sensitive habitat to search for tracks.

Focus on body mechanics. Watch one small section of the snake at a time. Follow a bend from head toward tail, or look for sections that lift and set down. This makes the role of coordinated muscle action easier to understand than watching only the head. If the view is too fast, slow the video rather than attempting to make a live snake move more slowly.

Compare different settings. Use footage of a snake on rough ground, in a narrow passage, and on loose sand. Note that the movement categories are useful descriptions, not rigid boxes: a snake can adjust its locomotion as the surface changes, and not every species uses all four patterns equally. A comparison is most useful when the clips show the full body and identify the habitat accurately.

Turn it into a drawing exercise. Sketch the snake’s outline at several moments in a clip, using a new line for each moment. The changing shapes can make a traveling wave, a bunch-and-extend pattern, or a straight body progression much easier to see. Label only what is visible, and leave uncertain details blank rather than filling them in from assumption.

Storage and Reheating

There is no prepared food to store or reheat. Keep your notes in a notebook or save digital observations and photographs on your device. If you take photographs, follow local rules about wildlife images and avoid posting a precise location when it could draw crowds to a vulnerable animal. Do not save or share images that reveal a snake’s hiding place in a way that could encourage people to disturb it. For a classroom activity, reuse the notes or video during a later lesson; no special preservation method is needed.

Frequently Asked Questions

Do snakes actually walk?
No. Snakes lack legs, so they do not walk with alternating steps. People sometimes say “walk” casually to mean that a snake is moving, but the more accurate description is that it slithers or uses a particular form of locomotion such as lateral undulation or sidewinding.

How does a snake move forward without legs?
It coordinates muscles along its body and uses contact with the ground or other surfaces to create forward force. Scales and the shape of the body help with traction, while the ribs and muscles support and control movement. The exact pattern depends on the snake, the surface, and the space available.

Which type of snake movement is most common?
Lateral undulation is a familiar and widely used pattern, in which S-shaped bends travel along the body and push against contact points. It is not the only method, and it is not equally suited to every surface. Snakes may use other patterns when moving through a tight space, across loose terrain, or with little visible sideways bending.

Can a snake move in a straight line?
Yes. Rectilinear locomotion lets some snakes progress with relatively little side-to-side bending. Sections of the underside move forward in sequence, helping the body advance. It is most easily understood in a clear video or a naturally visible side view; there is no reason to approach a live snake to check its belly movement.

Is it safe to watch a snake outside?
Watching from a distance can reduce risk, but no single distance guarantees safety in every situation. Do not approach, touch, corner, or attempt to identify an unfamiliar snake at close range. Keep children and pets away, follow local wildlife guidance, and contact a qualified local professional if the snake is in a home or public area where people may encounter it.

Why do snakes move differently on sand or in a narrow space?
Different surfaces offer different amounts and kinds of grip, and a narrow opening limits how widely a snake can bend. Sidewinding can help some snakes travel over loose sand, while concertina movement is useful where the body must alternately anchor and extend. The visible pattern reflects both the animal’s body mechanics and the environment around it.

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