In a hunting territory, some details may seem almost insignificant. A slightly sagging fence, a small ditch, a break in a slope, an opening in a hedge, or simply a few meters of less dense vegetation can, however, concentrate a large part of the game’s movements.
The phenomenon is particularly noticeable with roe deer and wild boar. A fence could theoretically be crossed over several hundred meters, but the tracks often concentrate in the same spot. A ditch offers several possibilities, yet the animals regularly use the same slope. On a bank, a few dozen centimeters of gentler slope can gradually become a true game trail.
This behavior is not due to chance.
Game does not cross its territory by systematically seeking the shortest path. It generally looks for a compromise between Energy saving, safety, cover, knowledge of the terrain, and escape possibilities.
When a path meets these criteria properly, it can be preserved for a very long time. The vegetation is crushed, the soil compacts, the route becomes easier, and other animals can in turn begin to use it.
An obstacle that seemed to simply hinder movement can then become exactly the opposite: an element that channels the game and reveals the structure of its movements.

An obstacle immediately changes the way of moving around.

In a completely open environment, an animal theoretically has a very large number of possible paths.
Add a fence, a ditch, or an embankment and the situation changes.
The animal must now solve a problem: how to continue moving without exposing itself unnecessarily or exerting more effort than necessary ?
Not all points of an obstacle have exactly the same characteristics.
A fence can be slightly lower in one spot.
A thread can be relaxed.
A ditch can have a gentler slope.
A slope can have a small natural break.
For a human, a few centimeters of difference may seem insignificant. For an animal regularly using the same route, they can be enough to create a preferred passage.

Energy saving explains part of the phenomenon.

Each movement has a cost.
Jumping over a fence requires more effort than going through an existing opening. Climbing up a steep bank costs more than using a small natural ramp.
One should not assume, however, that the game is incapable of crossing the more difficult areas.
A roe deer can easily overcome a significant obstacle, and a wild boar can cross difficult terrain.
The question is rather: Why choose the difficult option when a simpler solution exists nearby ?
If the easy route does not present any particular risk, it naturally becomes interesting.
Used regularly, it eventually becomes a habit.

Safety can be more important than convenience.

The physically simplest route is not always the one that will be chosen.
Imagine two openings in the same fence.
The first one is wide but opens out in the middle of a completely open meadow.
The second one is narrower but is located in close proximity to a hedge.
For a human, the large opening obviously seems more practical.
For an animal, the second one can be much more interesting.
After overcoming the obstacle, he immediately finds:

• covered ;
• shadow ;
• vegetation ;
• possibility of disappearing quickly.
  The feeling of security can therefore outweigh pure convenience.

The game does not only look at the obstacle.

A common mistake is to analyze only the crossing point.
But the animal does not only think:
"How to get over this fence?"
The passage is part of a much longer itinerary.
What is before and after is sometimes more important than the obstacle itself.
A crossing can be interesting because it directly connects:

• a discount ;
• a food area ;
• a water point ;
• two forest massifs.
  To understand why a passage works, you must always look at its continuity within the landscape.

The possibilities of leakage are essential.

The ability to quickly take cover strongly influences movement.
A passage can be very easy to cross but lead into an area with no immediate escape.
Another may require a slight detour while providing almost instant access to a wood or a bramble patch.
The second one may be preferred.
This is one of the reasons why the passages located:

• in the corners of plots ;
• along the hedges ;
• at the foot of a slope ;
• Near an edge (or near a forest edge)
  are often particularly interesting to observe.

Fences can create a real funnel effect.

A long fence that is difficult to cross can gradually funnel animals towards only a few openings.
Several routes then converge towards a common point.
Before the obstacle, the animals can come from different directions.
After crossing, they can disperse again.
Seen on the ground, this phenomenon can create a very pronounced flow over just a few meters.
The fence then acts like a funnel.
It does not necessarily create movements, but it concentrates them.

A few centimeters can make all the difference.

A fence is never perfectly identical along its entire length.
The ground slopes slightly downward.
A stake is leaning.
A thread is loosening.
The vegetation grows differently.
A small difference can be enough to make a sector more comfortable.
An opening under a wire fence can become particularly attractive when it is located in an area already protected by vegetation.
Once the path is identified by several animals, its repeated use further increases its visibility.

Why does a passage become increasingly pronounced ?

Use gradually transforms the land.
At first, the place can simply be slightly easier.
Then the first passages crush the vegetation.
The ground is settling.
The small branches are pushed back.
The path becomes even more passable.
This evolution creates a cycle:
easier passage → more use → even easier passage.
It is precisely this mechanism that sometimes transforms an almost invisible difference into a real flow.

The memory of the territory maintains the habits.

The game does not completely rediscover its environment with each movement.
Animals gradually learn:

• the shelters ;
• the resources ;
• the obstacles ;
• the passages.
  A route that has already been successfully used therefore has an advantage: it is known.
  The animal roughly knows what it will find before and after crossing.
  This knowledge can also be particularly useful in case of a leak.
  A memorized route is easier to take quickly than an unknown area that would need to be analyzed at the last moment.

Why do ditches also concentrate crossings ?

A ditch constitutes a very particular obstacle.
Depending on its depth, width, and water level, it can be relatively simple or much more complicated to cross.
Animals often seek out areas offering:

• gradual descent ;
• stable background ;
• accessible ascent.
  Over several hundred meters of ditch, only a few areas can combine these three characteristics.
  The prints then end up accumulating there.

A simple natural ramp can become essential

On the edges of a ditch, observe the variations in slope.
A slight sinking of the ground can form a kind of ramp.
The earth is sometimes more visible there.
The vegetation is lying down.
Some footprints appear in the background.
This area can become a lasting passage point.
The more it is used, the more the slope compacts and becomes passable.
The animal then benefits from a crossing that is almost marked by the previous use.

The nature of the soil strongly influences the choice.

A passage that seems visually perfect may be little used if the ground there is bad.
A very muddy bank can become slippery.
A ditch bottom can hold a lot of water.
A slope can collapse easily.
Another sector slightly further away but more stable can therefore be preferred.
This is one of the reasons why reading a map is never enough.
The truly important characteristics often only become apparent in the field.

The weather can temporarily shift the crossings.

After a heavy period of rain, a usual crossing can become less appealing.
The ditch is filling up.
The ground is becoming unstable.
Animals can then use another area.
A few days later, when the water level decreases, the old passage can become active again.
Therefore, one should avoid considering a crossing point as definitively abandoned after a few days without any traces.

The slopes produce exactly the same mechanism.

A slope sometimes appears passable along its entire length.
However, its slope is never perfectly uniform.
A root, a small break, or a more compact area of soil can offer an easier route.
The game begins to use this area.
The floor is getting marked.
A small flow appears.
Over time, the passage can become obvious.
Once again, it is not necessarily a spectacular choice.
A few degrees of slope or better soil stability may be sufficient.

Several species can use the same crossing.

A waypoint does not necessarily belong to a single species.
The same crossing can be used by:

• roe deer ;
• wild boars ;
• foxes ;
• badgers.
  The ease, cover, and continuity of the route can be of interest to several different animals.
  The traces then overlap.
  That is why a large lava flow should never be automatically attributed to a single species.

Wild boars often leave very visible trails.

The wild boar can quickly change the appearance of a path.
The soil is compacted or turned over.
Some branches are moved.
The vegetation can be clearly open.
Crossing then becomes easy to spot.
But a spectacular passage can be old.
You should always look for signs of freshness before concluding that there is current activity.

Roe deer crossings can be much more discreet.

The roe deer can use a narrow opening that is barely noticeable.
Sometimes a few fingerprints are enough.
One can also notice:

• slightly flattened vegetation ;
• small hairs on certain threads ;
• tracks in a wetland.
  A discreet passage can nevertheless be used very regularly.
  The absence of large traces therefore does not mean low attendance.

How can you tell if a passage is truly active ?

It is necessary to look for several matching signs.
A very clear flow indicates that an area has been used.
She does not say when.
To determine its recent activity, observe:

• prints with sharp contours ;
• freshly moved earth ;
• turned leaves ;
• vegetation still lying down ;
• marked mud ;
• hairs possibly retained.
  A small fresh footprint can provide more information than a huge old flow.

Mud often serves as an excellent indicator.

A slightly damp area preserves traces particularly well.
When several animals cross regularly, it is sometimes possible to distinguish several layers of footprints.
After heavy rain, the analysis obviously becomes more complicated since some traces are erased or distorted.
It is therefore always necessary to consider the indicators in the context of recent weather conditions.

The passage can be very frequent without being a living area.

It is an important distinction.
A crossing point can receive many visits while the animals never stay in one place.
They are simply crossing the area.
A large number of footprints does not necessarily mean that:

• discount ;
• food ;
• rest
  are located immediately nearby.
  The place may simply serve as a necessary link between two interesting areas.

Can the wind influence a passage ?

Yes, but it must not become the universal explanation.
The sense of smell obviously plays an important role in the perception of the environment.
A route allowing the animal to olfactorily monitor an area can provide an advantage.
But the wind acts at the same time as:

• relief ;
• covered ;
• resources ;
• habits.
  Local air movements around hedges, ditches, and embankments must also be taken into account.

Human pressure can move a passage very quickly.

A crossing that was once very active can suddenly lose its appeal.
The structure of the obstacle, however, has not changed.
You then need to observe the environment.
Is a new path being used ?
Have forestry works started ?
Has the presence of walkers or dogs increased ?
A repeated activity can cause animals to slightly alter their route.
They can continue to use the same general area while crossing the fence fifty meters further on.

An abandoned passage does not therefore mean the disappearance of the game.

This is an essential point.
When the tracks disappear from a known crossing, it would be incorrect to immediately conclude that the animals have left the territory.
Look along the obstacle.
A new passage may have appeared.
The overall displacement sometimes remains exactly the same.
Only the exact crossing point has changed.

Agricultural work can disrupt routes.

A harvest instantly transforms the environment.
A plot that previously offered a lot of cover becomes completely open.
A passage once secure can become much more exposed.
The game can then change its route.
Conversely, a new hedge or an area of dense vegetation can create an interesting movement corridor.
The value of a passage therefore always depends on the surrounding landscape.

The season also influences the crossing points.

A route used in summer is not necessarily as interesting in winter.
The vegetation is changing.
Cultures are disappearing.
The leaves are falling.
Some areas are losing their cover.
The physical passage still exists, but the perceived security is no longer the same.
The usage times can then be shifted or the crossing temporarily abandoned.

A good spotting starts before and continues after the obstacle.

When you find a flow, do not remain focused on the two meters of fence involved.
Look further.
Before the obstacle:

• Where does the trace come from ?
  After:
• Where is she heading ?
  This observation gradually allows the reconstruction of the network.
  A crossing becomes particularly interesting when it clearly connects two functional areas of the territory.

The territory must be understood as a network.

Game does not move through a series of isolated points.
It uses a network including:
clearings → transition zones → pathways → resources → water points → cover.
Obstacles are particularly interesting because they sometimes force this network to tighten.
They make visible movements that would be much more difficult to identify in a large open area.

Why should one avoid constantly visiting the passage ?

When a passage seems promising, the temptation is strong to regularly come back and observe the new footprints.
But each visit can bring:

• human odor ;
• noise ;
• disturbance.
  In an usually quiet sector, this pressure can be enough to change behavior.
  It is therefore preferable to limit unnecessary intrusions.
  Observing more does not necessarily mean understanding more if the observation itself changes what one is trying to study.

Camera traps can complement reading.

When used in accordance with applicable regulations, camera traps can be used to determine:

• species using the passage ;
• hours ;
• frequency.
  They notably allow for verifying a common situation: a perfectly active flow but one that is mainly used when no one is present.
  The device does not, however, replace field indicators.
  He completes them.

Why should one avoid constantly moving a camera ?

A stable location allows for the comparison of periods.
If the device is changed every two days, it becomes difficult to know whether a decrease in observations is due to:

• about the behavior of animals ;
• or simply from the new location.
  To understand a passage, the continuity of observation is often more important than the multiplication of installations.

Breakout points are excellent indicators.

When a passage is followed over a long period, it becomes a true reference.
An increase or decrease in attendance can indicate a change in the area.
We can then look for the cause:

• human pressure ;
• seasonal change ;
• food resource ;
• modification of the cover.
  The passage does not automatically provide the explanation, but it indicates that something has changed.

The most obvious passage is not always the most important.

The human eye is drawn to spectacular openings.
A large breach seems immediately interesting.
However, the actual passage used may be right next to it, under a hedge or behind a small break in the terrain.
During the spotting, it is therefore necessary to examine the margins and the details.
Animals have no reason to choose the most visible crossing.
They choose the one that best suits their needs.

The most durable passages generally combine several advantages.

A crossing point used for a long time rarely has only one quality.
He often combines:

• easier obstacle ;
• stable ground ;
• immediate coverage ;
• path to a resource ;
• possibility of leakage.
  It is this accumulation that explains its longevity.
  Taken separately, no detail seems exceptional.
  Together, they create a particularly logical route for the animal.

Conclusion

Why do game animals always choose the same passages to cross fences, ditches, and embankments ?
Because an obstacle transforms a free trajectory into a series of choices.
The animal generally looks for a passage that requires little effort while ensuring its safety.
An opening becomes attractive when it combines ease of crossing, cover, terrain stability, route continuity, and the possibility of escape.
Then habit reinforces the phenomenon.
The vegetation is being crushed.
The ground is settling.
The passage becomes even easier.
A difference of a few centimeters can thus end up concentrating a large part of the movements in the area.
But these routes are never completely unchangeable.
Rain, season, agricultural work, changes in cover, or disturbance can shift the crossing.
That is why you should always look beyond the flow itself.
Where do animals come from ?
Where are they going ?
What obstacle are they trying to overcome ?
Which place setting do they find next ?
Are the clues really fresh ?
By answering these questions, a simple fence or a small ditch cease to be mere details of the landscape.
They become essential elements for understanding. How does game (wild animals) actually structure its movements?.

FAQ

Why does game always use the same opening in a fence ? Because it often combines ease, safety, and continuity with a route that is already known.
Do animals always choose the easiest path ? No. A slightly more difficult passage may be preferred if it offers more cover or safety.
Why does a fence channel movement ? It limits the available paths and can concentrate the animals towards a few crossing points.
Why do animals pass through the same spot in a ditch ? Some sections offer a gentler descent, a more stable bottom, and an easier ascent.
Do embankments also cause landslides ? Yes. A slightly gentler slope can gradually become a very pronounced passage.
Can multiple species use the same passage ? Yes. The same spot can be frequented by roe deer, wild boars, foxes, or badgers.
How can you tell if a lava flow is still active ? You need to look for fresh footprints, recently disturbed soil, flattened vegetation, or other recent signs.
Is a very prominent flow necessarily recent ? No. An old lava flow can remain visible for a long time.
Why can a passage be suddenly abandoned ? Disturbance, season, weather, harvests, or changes in the cover can alter the route.
Can game create a new passage a few meters from the old one ? Yes. A local modification may be enough to move the crossing.
Does human pressure influence crossings ? Yes. Animals can change their schedules or slightly alter their routes.
Can harvests change a flow ? Yes. A previously protected plot can suddenly become very exposed.
Why should one avoid visiting a passage too frequently ? Intrusions add smells, noise, and disturbance and can alter behavior.
Can a camera help analyze a passage ? Yes, when it is used in accordance with regulations, particularly to know the schedules and the species present.
Does a frequent passage mean that the game lives right next door ? No. It can simply be an axis connecting two distant areas.
Does the wind influence crossings ? It can contribute to the choice of a route, but it acts along with many other factors.
Why are areas close to the cover often used ? They allow animals to overcome the obstacle while maintaining the possibility of hiding or quick escape.
What is the best way to analyze a crossing point ? Observe the obstacle, look for fresh clues, then understand the complete route before and after the passage.