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Deer have an amazing capacity to multiply. Roe deer usually have twins every year, so populations can escalate. This
population growth can lead to increasing levels of damage to trees and in some cases, completely suppress woodland
establishment.
Deer can impact severely on trees, especially tender young trees. Their browsing prevents new growth. When male deer rub
trees with their antlers while shedding their velvet and when marking their territory, bark is scratched causing
deformation and potentially death of the tree.
At Roamers Wood, SWLD have chosen to establish many species of tree with high biodiversity value, some of which are
particularly susceptible to deer damage, so mitigating actions are necessary to keep tree loss at an acceptable level.
In Scotland, it is recognised that we need to expand our forests and woodlands if we are to tackle climate change and
biodiversity loss, create recreational sites and encourage rural employment; but it is simply not possible to do this if
the high density of deer is not tackled. For example, the Borders Forest Trust project at Carrifran found that as few as
eight roe deer browsed and badly damaged all recently planted trees over a 40 hectare area. This is a very low density
of deer and yet they had a significant impact.
The Scottish Natural Heritage publication Code of Practice on Deer Management explains the duties and responsibilities
relating to our land.
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Male deer can legitimately be culled all year round. Females are not culled between the end of March and late October
because they may have dependent offspring.
Culling in Scotland usually occurs one hour before sunrise until one hour after sunset. Where required, NatureScot may
issue authorisation which allows culling to take place during the night.
The stalker at Roamers Wood is qualified and experienced, follows Best Practice and is on NatureScot’s Fit and
Competent register. Night-vision scopes are now commonplace kit, and the stalker can easily identify any heat source
from around 800 meters and abandons any stalk if members of the public are in the vicinity.
Carcasses enter the food chain as a healthy and sustainable source of meat.
The Deer (Scotland) Act 1996 sets out the way deer management is conducted in Scotland.
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The perimeter of Roamers Wood is more than 1.5km and would cost around £25,000 to fence, which is beyond the reach of a
non-commercial woodland project.
In addition to their cost, fences have other drawbacks. Fences prevent easy access for people to recreational areas;
gates are accidentally left open; and they are often viewed as unsightly in a natural landscape. Furthermore, fences
need continual maintenance—they can last as little as 10 years—and result in lots of metal to dispose of at the end of
their lives. Deer also hurt themselves attempting to cross fences, bird collisions occur, and they prevent free movement
of other animals such as hare, whose populations are not flourishing.
Even when fences are erected, they are not a complete solution. There is a diverse structure to a woodland which
requires multiple levels of understorey in order to be maximally beneficial to wildlife. When fences are removed, deer
move in and can quickly undo years of hard work by preventing the growth of understorey layers.
Neither do fences fix the issue of high deer density, they just reduce deer habitat/space. Where fences are used, deer
can be pushed onto neighbours’ land, moving the issue next door. In the spirit of the Deer Code, landowners should
manage the deer that enter their woodlands, which also helps protect new woodlands nearby.
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Tree-guards (tubes) provide some protection but are not a complete solution because deer can browse up to two metres off
the ground by standing on their back legs. Guards are generally 1.2m high or less which means deer can browse trees when
they reach the top of tubes. Taller guards are not practical because they are increasingly more vulnerable to being
blown over (which is a particular problem in exposed sites such as Roamers Wood), damaging the saplings. Also, tall
guards cause trees to grow without a strong enough root system so they are unable to support themselves properly when
the guards are removed.
Some trees naturally branch low down, as is the case for all the fruit trees in Roamers Wood. It is not possible to put
guards on these low-level branches. Additionally, it is impractical to guard self-seeded saplings so where deer browse
is too great, a woodland will not regenerate or develop an understorey which is an essential component of a biodiverse
woodland. Guards also involve installing a lot of plastic which is not ideal in a natural environment.
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There are few natural predators of deer in Scotland—foxes and badgers have been known to occasionally catch very young
roe deer kids—and cars are sometimes mentioned as fulfilling this role. Road traffic accidents are not a humane way to
manage deer numbers, are not effective (only affecting deer directly adjacent to roads and predominantly killing
immature deer), and are a danger to people.
There are a few tree-paint solution deterrents—which do not always work—and whilst they may protect the trees, they do
not protect the other vegetation which is an important component of a woodland. Like fences, these deterrents require
continual upkeep and so are too expensive and time consuming for non-commercial woodlands
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Recent observations and studies have revealed a minimum of five roe deer present in Roamers Wood every night, with 15 to
20 in the surrounding area. The risk that deer damage poses to a woodland varies according to its location, but by
bordering the Pentland Hills, Roamers Wood is easily accessible to a large population of deer.
In Scotland, the data show that just one deer in an area the size of Roamers Wood (which is 5.5 hectares) can prevent
all tree growth. For there to be an acceptable level of damage to newly-planted trees, the density of deer must be
significantly less.
The deer are coming into Roamers Wood when it is dark and have, for example, recently eaten all the newly-planted holly
trees. In addition, the hazel trees coming into leaf have been badly damaged, along with the fruit trees and shrubs. Of
the trees that have grown out of their guards, more than half have had their leading shoot damaged. This has all
occurred in a single season, and the damage will be cumulative over the years of early growth, so the scale and impact
of deer damage quickly increases.
Losing their leading shoot and most leaves, can kill newly-planted trees and those that survive cannot grow into
normal-sized trees. This is because frequent browsing forces trees to grow as bushes, unable to grow above browse
height.
Roamers Wood is not a commercial woodland so the aim of culling is not to eradicate deer but to keep damage low enough
to allow enough trees to grow, to establish the woodland. Once established, Roamers Wood will provide a better habitat
for deer than it does now.
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There are now over 5000 tree saplings, most around 30cm high, in the 5.5 hectare area of Roamers Wood. Recommendations
from the government and conservation organisations, such as The Woodland Trust, advise planting 1000 - 2500 trees per
hectare. This is because it is recognised that the shape of the trees will be improved by the presence of adjacent
neighbouring trees and that a percentage will be killed by forces beyond our control such as drought, competition with
grass and disease.
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It is hoped that trees will be tall enough in a decade or so but this is dependent on enough trees getting enough
initial protection to establish and grow properly during this time. It is usually only feasible to replace lost trees in
the first five years of a woodland, before there is too much competition and shade for new trees to establish.
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Once a woodland has reached the level of maturity where there is natural regeneration, then the woodland becomes
self-sustaining, provided deer browse is maintained at what might be called "natural levels"—that level which would
exist if there were natural predators. If deer numbers are excessive then there is insufficient natural regeneration to
sustain the woodland. In the Woodland Trust woods known as The Catwalk, there is very little regeneration taking place,
even in areas where the canopy is open.
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While the majority accept culling is an unfortunate necessity, SWLD recognise this is an emotive issue. Please use the
comments form at the bottom of the page if you would like to get in touch with SWLD about deer management at Roamers
Wood, or follow the links below for comments and queries relating to deer management policies.
It is with regret that having considered all the options, deer culling must continue in Roamers Wood (alongside using
tree-guards and re-planting) due to the increasingly high deer densities in this area. Culling will be carried out by a
qualified, experienced, and registered stalker, and a night licence will be sought to minimise disturbance.
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Yes. The deer legislation has been reviewed four times recently. Best Practice and the Code of Practice
on Deer Management are all under constant review.
Here is a selection of the wealth of policy guidance, data and advice that SWLD has consulted:.
British Deer Society (Why manage deer?)
Borders Forest Trust (Establishing woodland at Carrifran)
John Muir Trust (Deer management FAQ)
NatureScot, Scotland's Nature Agency
(Deer management in Scotland - Frequently Asked
Questions)
NatureScot, Scotland's Nature Agency
(Code of Practice on Deer Management)
Lowland Deer Network Scotland
(Deer on your Doorstep)
Scottish Government (Managing Scotland's deer numbers)
UK Government (Deer (Scotland) Act 1996)