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Description:
These tortoises belong to
the genus Testudo meaning “turtle” in Latin. The Testudos
also referred to as the Mediterranean tortoises are known as
common European “garden” tortoises and are now widely
available in the United States pet trade as captive bred
hatchlings. Testudo hermanni the Hermann’s tortoise is a
small to medium sized chelonian and is known for the
hardened tip or spur at the end of the tail and lack of
thigh tubercles. To date there are three recognized
subspecies.
The western Hermann’s
tortoise (Testudo hermanni hermanni) considered the nominate
race, is the smaller and rarer subspecies. These animals
typically attain smaller dimensions than their cousins and
appear more attractive as well. The ground color they
exhibit is a rich golden yellow to bright greenish yellow
bordered by jet black bars, bands or blotches usually
covering more than 50% of the carapace. There is a well
defined “keyhole” symbol on the 5th vertebral
scute just above the supracaudal shield and it is present in
more than 95% of the animals I have observed. The head is
rather snake or lizard like in appearance and is sleeker
than the heads of the other subspecies. A bright yellow
fleck or spot is clearly visible underneath and just behind
each eye and this is present in almost all animals except
for extremely old ones. The skin color resembles that of the
carapace’s ground color but is usually darker and drabber.
On the plastron there are two longitudinal jet black bands
that are well formed and are only broken on the gular and
anal scutes in some cases. The seam between the femoral
scutes on the plastron is longer than that of the seam
between the pectorals but in certain instances they can
appear even. Rarely is the pectoral seam longer than the
femoral. Females rarely exceed six inches while males may
never surpass four; however larger examples have been
recorded. The western Hermann’s tortoise is also known for
being rounder and more domed in appearance when compared to
the other subspecies. These animals are very rare in
collections in the USA and finding pure bred specimens can
prove to be quite difficult. They are no longer imported.
The eastern Hermann’s
tortoise (Testudo hermanni boettgeri) is the larger more
common race. These tortoises are duller in appearance and
colors as well as markings can vary extremely. The ground
color of the carapace is typically a horn color or can be
brown, tan, yellowish, or cream colored. Black or dark brown
bars, bands and/or blotches border the ground color. The 5th
vertebral scute usually lacks the “keyhole” symbol but is
found in some specimens especially captive bred ones and
unusually attractive individuals. The head is bulkier with
the eyes situated higher up and the yellow spot or fleck
under each eye is usually absent. Skin color is dark and may
be tan, brown or grey. The plastron exhibits the
longitudinal black markings but they are faded, broken up
often and nowhere near as well defined or prominent as in
their western cousins. The seam between the pectoral scutes
is usually longer than that of the femorals or they may
appear even in various cases. Females typically reach seven
to eight inches but extremely large ten inch plus females
have been encountered in parts of the world such as
Bulgaria. Males usually do not surpass six inches but larger
animals are not unheard of. These tortoises have a flatter
appearance and are more elongate than round. Eastern
Hermann’s tortoises are very common in collections in the
USA and it is not hard to find captive bred hatchlings. Sub
adults are still imported into the country from time to time
but large breeders are rarely encountered.
The Dalmatian Hermann’s
tortoise (Testudo hermanni hercegovinensis) is a newly
described subspecies and there is quite a bit of question
surrounding them. They appear almost identical to the
eastern Hermann’s tortoise and only a few small details
separate the two. Carapacial ground colors as well as
markings are the same as in the eastern race only it is said
that the black pigment covers less than 50% of it. The
yellow fleck or spot under each eye is present but not as
bright as in the western race. The “keyhole” symbol is also
visible on the 5th vertebral in this subspecies
although I have seen many without it. The longitudinal black
bands are present on the carapace yet they are nowhere near
as clearly defined as in the western race but are more solid
and uniform than in the eastern race. The pectoral and
femoral scute seams are even in length and there is a sharp
“U” shape that is formed by the top edges of the humeral
scutes. In the eastern and western race this shape is more
of a “V”. Perhaps the most distinguishable characteristic of
these tortoises is the absence of the inguinal scutes where
the carapace meets the plastron just in front of each hind
leg. The eastern and western races both exhibit the inguinal
scutes but most Dalmatians do not. However, is has been
recorded that Dalmatians may have both inguinals or in some
cases just one. These tortoises are available in the USA pet
trade but for most it is hard to differentiate them from
their eastern cousins. |
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Sex:
Sexual dimorphism is very apparent in Hermann’s tortoises.
Males like most species of chelonian are smaller than
females. They exhibit a concave plastron and a very long,
thick tail. The vent is also further past the end of the
plastron when compared to females. Males also appear more
trapezoid in overall shape while females may be rounder or
more elongated. Females have a shorter, stubbier tail and
the plastron is flat. Both sexes exhibit the hardened tip or
spur at the end of the tail and it is believed that males
use this to stimulate the female’s cloacal region during
courtship. It is unknown if it is of any use to females.
Males can prove to be overly aggressive towards other males
as well as females during breeding season. Females are
usually very passive and only become aggressive when they
are gravid or in very crowded conditions. |
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Distribution:
These
tortoises are found throughout southern Europe. Yugoslavia,
Albania, Romania, Greece, Turkey and Bulgaria are all
inhabited by the eastern race while the western race is
restricted to Italy, France and Spain. |
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Habitat:
Hermann’s tortoises are found in Mediterranean oak forest,
rocky hillsides, pastures and scrub land. These areas
include south facing slopes and the abundance of low lying
shrubs and various edible weeds. Rocks, logs, grasses and
shrubs are used for climbing, burrowing under and for
creating scrapes as retreats for the tortoises to hide in
and seek shade. These animals are not found in water and are
poor swimmers and due to where they live, water is scarcely
available. Hermann’s tortoises obtain most of their water
through their diet and may drink from rain puddles as well.
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Housing: Hermann’s
tortoises are best kept in outdoor enclosures where they can
live in semi natural conditions. A well planted outdoor pen
situated on well drained soil makes for a great captive
environment for these tortoises. Do not construct pens on
wet or moist areas and simply using a grassy lawn is not a
good idea. Although Hermann’s tortoises prefer a bit more
humidity in their environment than most other Testudo, they
should never be subjected to damp situations. A variety of
edible weeds to promote natural grazing is suggested as well
as an array of decorations such as logs, rocks, slates,
shrubs, African grasses and bushes for exercise, hiding and
burrowing. Make sure to keep tortoises well protected from
predators such as dogs, cats, ravens, raccoons, skunks,
weasels, and overly curious children. A thick wire mesh
screen should cover most if not all of the outdoor enclosure
to keep invaders out.
Indoors these animals can be
housed in large custom built units or “tortoise tables”. A
substrate of aspen wood bedding is highly recommended or you
can make your own 50% soil/50% sand mix. The latter can
prove to be difficult to keep clean. UVB and UVA emitting
bulbs should be used especially with hatchlings to help
achieve proper growth and heat. Half logs, rocks or boxes
with an entrance cut into them make great hide outs.
Frequent warm baths are recommended for tortoises kept
indoors to help with hydration and expelling waste build
ups. Keep tortoises away from windows and doors leading to
the outside in order to avoid harmful drafts. All glass
aquariums do not make suitable homes for Hermann’s tortoises
even for hatchlings. Rubbermaid containers work well or you
can construct your own unit using wood. |
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Feeding:
Hermann’s tortoises require a diet rich in fiber and very
low in protein. Commercial diets are usually safe for these
animals but in moderation. When feeding hatchlings
commercial tortoise foods pay close attention to growth
because pyramiding can easily happen in young specimens. As
stated before, allowing tortoises regular access to a
variety of edible weeds, grasses and flowers induces natural
grazing which in return promotes proper growth. Fruits
should not be offered to these animals unless it is once in
a blue moon. Romaine and red leaf lettuce are safe in
smaller amounts while ice burg lettuce is not at all. A
calcium supplement is recommended when feeding Hermann’s
tortoises and these can easily be found in most pet stores
world wide in the form of a powder. Cuttle bone commonly
used for birds is a great source of calcium for these
tortoises especially gravid females. The animals will simply
gnaw at the brittle bone until they are satisfied. I feed
my tortoises every other day and allow them to graze every
day in the warmer months. |
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Breeding:
There is no doubt that a
hibernation or cooling period does lead to long term
breeding success but it can and does happen without it. In
the wild these tortoise wake up from their winter rest
anywhere from March through May (depending on region) and
nesting occurs from May through July. Males reach a peak in
sexual activity immediately following their emergence from
their hibernaculums and again several weeks prior to cooling
down for the winter ahead of them. Females have been known
to store sperm for quite some time and can produce a few
years’ clutches from just one mating.
When engaging in courtship
the male chases the female relentlessly biting at her legs
and face. Shell ramming is not as common in this species as
it is in other Testudo but it does occur. Once the female
cooperates she will lift her self with her hind legs and
allow the male to achieve successful copulation. The male
mounts her from behind and curls his tail under where the
vents will meet and mating begins. During copulation the
male emits several high pitched squeaks and holds his mouth
open with his tongue hanging out.
Gravid females become
extremely restless when they are nearing nesting. They will
continuously pace the perimeter of their enclosure in search
of a proper nesting site. Females prefer south facing slopes
with well drained soil to deposit their eggs and dig several
test holes usually up to three days prior to the actual
event.
Females of the eastern race
typically lay four to six eggs in a single clutch. Larger
and smaller clutches are also encountered. Females of the
western race usually produce less with two to three eggs
being in a single clutch. Females of both races have been
known to double and even triple clutch in one season with
anywhere from fourteen to thirty days in between nests.
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Incubation:
Eggs laid in an outdoor enclosure or specially made indoor
nesting box should be removed at once and placed in an
incubator. Hovabators make great incubators and can be found
in both pet and feed stores. An incubation medium of
moistened but not wet vermiculite or perlite works best. I
have had success with soil, sand, aspen bedding and sphagnum
moss as well. Place each clutch in their own deli cup or
small Tupperware with a few holes punched into the lid.
Turning the eggs right after they have been laid will not
cause any harm although once the embryo has begun to grow it
is imperative that you do not turn them. The key to
successful incubation of Hermann’s tortoise eggs to make
sure you do not keep them too moist. I keep a large bowl of
water in the incubator for the entire incubation period and
only lightly spray down the individual deli cups
occasionally. At a temperature between 84 and 91 degrees
Fahrenheit the baby tortoises will emerge from their hard
shelled eggs in about 55 to 62 days. Like most chelonians
their sex is determined by the temperature the eggs are
incubated at and higher temps will produce females, lower
temps will produce males.
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Hatchlings:
Hatchling Hermann’s tortoises
are quite small immediately following hatching and need time
to straighten out. During the time they have been inside the
egg they have basically been folded in half. When the babies
leave the egg their movements are awkward until they achieve
normal formation. The yolk sac is still visible for roughly
a week and is the animal’s source of food for the first few
days to a week of its life. Once the remainder of the yolk
sac has been absorbed the babies usually begin feeding
voraciously. They require the same diet as adults do but it
may be necessary to cut their food in to tiny pieces to aid
them in swallowing. A calcium supplement is very important
in raising tortoises and should be provided at feeding time.
A proper enclosure for hatchlings and juveniles should
closely replicate that of the adults’ but on a smaller
scale. I recommend keeping babies indoors until they are
four inches in length to avoid losing them to over heating
and predators such as birds and rats. Hermann’s tortoises in
captivity can achieve sexual maturity in as little as five
years for females and two years for males. It is suggested
that you grow the babies slow like they would in nature to
avoid pyramiding and other deformities. Be sure to give your
hatchlings weekly warm baths. |
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CHRIS LEONE |
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