What kind of animal is the Antarctic Tortoise? An updated explanation of its characteristics, personality, ecology, habitat, and reproduction. An endangered species that can be seen in zoos and picture books.

What kind of animal is the Antarctic Tortoise, which has been successfully hatched and bred in zoos and other places? We will explain its characteristics, personality, ecology, and habitat. It is endemic to Madagascar and is said to be the most endangered tortoise, and conservation efforts are currently underway. Of course, this turtle is also designated as an endangered species.

What is a Ploughshares? Basic Stats

The Ploughshare tortoise is a turtle classified in the order Testudins, family Testudinsidae, and genus Testudins. Its scientific name is Astrochelys yniphora, and its English name is Ploughshare tortoise. Its carapace length is 36-48cm and its weight is 5-20kg. The list of information is as follows.

Japanese（和名）	ヘサキリクガメ
English（英名）	Angonoka / Ploughshare tortoise / Madagascar tortoise / Madagascar angulated tortoise
scientific name(学名)	Astrochelys yniphora
classification（分類）	Reptilia、 Testudines、 Testudinidae、Astrochelys 爬虫綱、カメ目、リクガメ科、マダガスカルリクガメ属
IUCN Status(保全状況)	CRITICALLY ENDANGERED
Length（体長）	36～48cm
Weight（体重）	5～20kg

Taxonomy of the Antarctic Tortoise

• 界（Kingdom）：動物界 (Animalia)
• 門（Phylum）：脊索動物門 (Chordata)
• 綱（Class）：爬虫綱 (Reptilia)
• 目（Order）：カメ目 (Testudines)
• 科（Family）：リクガメ科 (Testudinidae)
• 属（Genus）：リクガメ属 (Testudo)
• 種（Species）：ヘサキリクガメ (Testudo horsfieldii)

What are the roots and origins of the ploughshare tortoise?

The ploughshare tortoise (Astrochelys yniphora) is a large tortoise species endemic to Madagascar, found only in the northwestern part of the island. It is known in English as the “Angonoka” or “Ploughshare tortoise.”

🌍 Origins: “Northwestern Madagascar”

A key factor in understanding the origins of the ploughshare tortoise is that it evolved independently on the island of Madagascar.

Because Madagascar has been isolated from the African continent for a long period, many animals there have undergone unique evolutionary processes.

Broadly speaking, the evolutionary history is thought to be:

Ancestors of early tortoises
↓
Arrival in Madagascar
↓
Long-term isolation on the island
↓
Divergence into a unique tortoise lineage
↓
Emergence of the ploughshare tortoise

However, the fossil record indicating exactly when the ploughshare tortoise diverged—or from which specific ancestor—is extremely scarce, making it impossible to pinpoint the precise date of its origin.

🧬 Who are its closest relatives?

The ploughshare tortoise belongs to the genus Astrochelys, alongside other species endemic to Madagascar, such as:

The radiated tortoise (Astrochelys radiata)

(Note: Be careful to avoid taxonomic confusion regarding the yellow-bellied tortoise/radiated tortoise distinction.)

The radiated tortoise is particularly significant.

Under current classification, the relationship is structured as follows:

Family Testudinidae (Tortoises)
↓
Endemic lineage of Madagascar
↓
Genus Astrochelys
↓
├─ Ploughshare tortoise
└─ Radiated tortoise

🏝️ Why is it found only in Madagascar?

Madagascar has been isolated from the mainland since ancient times, allowing a unique fauna to develop within that environment.

The ploughshare tortoise is a prime example of this. The remaining wild population is confined to a very small area around the Baly Bay region in northwestern Madagascar.

Rather than dense forest, they inhabit an environment characterized by a mosaic of dry deciduous forest, grasslands, and shrublands.

Habitat

Ploughshare tortoises are found in Madagascar.

1. Distribution

Distributed mainly in Central Asia

Southern Kazakhstan

Uzbekistan

Turkmenistan

Northern Afghanistan

Eastern Iran

Prefers desert, semi-desert, and arid steppe regions

2. Habitat

Arid zones, steppes, and desert vicinities

Dry areas with grasses and shrubs, where food is easily gathered

Burrowing (digging underground burrows)

Rests in burrows to avoid daytime heat and dryness

Hibernates in winter

Temperature and Humidity Requirements

Tolerates high temperatures and dryness, but does not tolerate extremely humid environments

Regulates body temperature by basking

3. Biology

Semi-diurnal, active in the morning and evening, often resting in burrows during the day

Omnivorous

Feeds on grass, leaves, fruit, small insects, etc.

As a small tortoise, it has a strong hiding habit

Spends in holes or under shrubs to protect itself from predators

What are its characteristics? What kind of creature is it?

Pit tortoises are endemic to the island of Madagascar. Their carapace is dome-shaped and slightly elongated when viewed from above. The front and rear edges of the marginal carapace are slightly pointed, and the throat carapaces on both sides protrude. The carapace is yellowish brown, grayish brown, or light brown, with dark borders around the joints and surrounding areas of each carapace. Pit tortoises live in shrubs, bamboo forests, brush, and grasslands, and are active during the day.

1. Appearance and Physical Characteristics

Size

This small tortoise measures approximately 15-20cm in carapace length as an adult.

It weighs approximately 1-2kg and is lightweight.

Shell (Dorsal Carapace)

Rounded, dome-shaped

Brown to dark brown in color, with dark markings and edge patterns on the carapace.

Adults have a more subdued overall color tone.

Plaston (Ventral Carapace)

Light yellowish-brown to pale yellow

Relatively simple pattern.

Head and Limbs

Small, round head.

Short, sturdy legs with well-developed claws for digging in sand.

Tail

The tail has a distinctive bony protrusion (caudal sheath) at the tip, which gives it its name.

2. Behavior & Ecology

Burrowing

They dig their own burrows to avoid high temperatures and dryness.

Activity Patterns

Crepuscular – active in the morning and evening, or during cooler times of the day.

They rest in burrows or under shrubs during the day.

Diet

They are omnivorous, eating grass, leaves, fruit, and occasionally small insects.

Reproduction

Egg-laying in spring and early summer.

Lays 4-8 eggs at a time.

Eggs are buried in sand and hatch.

3. Personality

Timid and cautious.

If they sense danger, they will immediately burrow into burrows or sand.

Gentle and rarely aggressive.

Gentle and easy to observe.

What is their personality like?

Pit tortoises are docile and very gentle. Therefore, they are a very gentle turtle to keep as pets.

1. Basic Personality

Gentle and rarely aggressive

Likely causes problems when kept with other small turtles or the same species

Highly timid and cautious

Immediately burrows into burrows or sand when encountering new people or large movements

When sensing danger, they will curl up and hide

2. Behavioral Characteristics

Burrow-dwelling and adept at hiding

Often rests in burrows or sand

Active in the morning, evening, and twilight

During the hottest part of the day, they rest in their burrows, remaining mostly still

Curious but reserved

They will slowly emerge to eat when food is available, but rarely approach people

3. Personality in Captivity

Relatively easy to handle small tortoise

Because they are timid, it is less stressful to keep them focused on observation rather than handling them forcefully

They will respond to food once they become accustomed to them

In captivity, they may come out of their burrows when food is presented

What is their ecology like?

Pit tortoises are almost entirely herbivorous, living on grass and other foods. They are oviparous, laying mainly 3-5 eggs at a time, several times a year. They reach sexual maturity at 20 years of age. Their lifespan is said to be 50 to 100 years.

1. Living Environment

Live in the arid, desert, and semi-desert regions of Central Asia

They are burrowing creatures, digging their own burrows

Avoid daytime heat and dryness

May hibernate in winter

They do not require water, but prefer areas with grasslands and shrubs where they can consume plants and small animals

2. Activity Patterns

Active in the mornings and evenings and when temperatures are cooler (crepuscular to dusk-dawn/dusk-active)

They often rest in burrows, sand, or under shrubs during the day

They bask in the sun (basking) to regulate their body temperature

3. Diet

Omnivorous

Grass, leaves, and fruit

Also eat small insects and arthropods

Young adults consume a large amount of animal-based food, but as they grow older, they also consume more plant-based food

4. Reproduction

Lays eggs in spring and early summer

Lays about 4-8 eggs at a time They lay eggs buried in sand or burrows.

Eggs can hatch in dry areas, but temperature and humidity control are important.

Young animals spend their time in holes or shaded areas, adapting to cave-dwelling life just like adults.

Do they have any natural enemies?

Natural enemies of the antelope tortoise include snakes, birds, and foxes.

About Ploughshare Tortoise Hatchery

This section provides a detailed overview of juvenile plowing tortoises (Testudo horsfieldii).

1. Appearance and Physical Characteristics (Hatchlings)

Size

Immediately after hatching, carapace length is approximately 3-5cm.

Grows to approximately 15-20cm.

Carapace (Dorsal Shell)

Softer than the adult, with a rounded, dome-shaped shell.

Brownish with distinct black or dark brown spots and borders.

Hatchlings have vivid patterns, which become somewhat more subdued as they mature.

Plastron (Ventral Shell)

Light yellowish-brown with a subtler pattern.

Head and Limbs

Feet have developed claws for digging in the sand.

They do not swim much, but are active on land.

Tail

They have a small protrusion (tail sheath) at the tip of their tail, a feature identical to that of adults.

2. Behavior and Personality (Juveniles)

Timid and highly cautious

If they sense danger, they will immediately burrow or burrow into the sand.

Most active in the morning, evening, and cooler times.

During the day, they stay still in their burrows or under shrubs.

Curious but reserved.

When presented with food, they will slowly emerge and eat.

3. Diet (Juveniles)

Omnivorous, but consumes a large amount of animal prey.

Small insects, earthworms, arthropods, etc.

Also consumes small amounts of plant matter (leaves and grass).

As they grow, they consume more plant matter, adapting to the same omnivorous diet as adults.

4. Ecology and Lifestyle

Spend most of their time in burrows or sandy areas.

Avoids high temperatures and dryness.

Hides during the day and is active in the morning and evening.

Especially vulnerable to predators as juveniles, they primarily engage in burrowing.

Adapts to the same burrowing and activity patterns as adults within a few years.

Are Plough Tortoises Endangered?

Plough tortoises are listed in Appendix I of the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES), and international trade is restricted. They are also designated as endangered species. Not only are their habitats reduced due to recent development, but they are also over-hunted as pets, which has become a problem. In Japan, many are hatched at domestic zoos such as Nogeyama Zoo, and wild turtles are exhibited. Information is also available on the internet.

1. International Conservation Status

IUCN (International Union for Conservation of Nature) Red List

Classification: Vulnerable (VU)

Meaning: Wild populations are declining and at high risk of future extinction.

CITES (Convention on International Trade in Endangered Species of Wild Fauna and Flora)

Listed in Appendix II

International trade requires a permit, and unauthorized import and export is prohibited.

2. Main Causes of Decline

Pet Trade/Smuggling

Due to their small size and hardiness, they are in high demand as pets, and wild capture is common.

Habitat Destruction

In the arid regions of Central Asia, farming and development are reducing burrows and grasslands.

Predators/Environmental Change

Wild individuals are preyed upon by birds, mammals, and snakes.

Climate change and extreme dryness also affect their habitat.

3. Conservation Status and Measures

International Regulations

CITES Appendix II restricts trade of wild specimens.

Captive Breeding

Pets can be legally bred for pet use.

From a wildlife conservation perspective, artificial breeding is recommended for captive breeding.

Habitat Conservation

Protection of the wild environment and development restrictions are underway.

Can Plough Tortoises be kept as pets?

Plough tortoises are also designated as endangered species, so it is difficult, but it is possible to keep them as pets. The items needed to keep a turtle are listed below. Small specimens are newly registered and sold, and there are many recruitments for foster parents, so check them out. Pay attention to the type of food and cage. They also have a long lifespan, so take that into consideration. Check the food and how to keep them warm. There are many products on sale at the shop, and it is easy to purchase supplies such as food, cases, and lights.

Cage

Depending on the size of the shell and the growth rate, a wide cage of about 60 cm is required in the shop. We recommend using a reptile cage made of glass, acrylic, or plastic.

Flooring

There are various types of flooring, from large to small. There are various types such as Akadama soil, coconut shell, and artificial turf. They are sometimes sold at low prices during campaigns.

Heater

If necessary, prepare an air conditioner or heater to make sure the turtle is comfortable. There are panel heaters, spot lamps, and basking lights.

Thermometer and hygrometer

When raising amphibious turtles, it is very important to manage the temperature and humidity. It is best to keep the temperature at around 30 degrees.

Lighting

Turtles are animals that maintain their health by producing vitamin D3 in their bodies, which promotes calcium absorption, by exposing them to strong ultraviolet rays in a day. Therefore, lighting is essential. There are incandescent and fluorescent tube types, and it is best to choose one that suits the cage. Use the sunlight hours as a guide for lighting.

Shelter

Turtles are living creatures, so it’s a good idea to have a shelter indoors to give them a place to escape. Make sure to set it up properly so as not to cause them too much stress.

Water dish

A water dish is also essential. Wash the water bowl every day and provide fresh water.

Pet food

Turtles are herbivorous, so their food consists mainly of small vegetables and fruits, and they also eat komatsuna and mushrooms. Some turtles eat wild plants instead of vegetables. Give them fruits such as bananas, watermelons, apples, strawberries, kiwis, and mangoes as snacks. Some people give supplements as a reference. It’s a good idea to start by providing commercially available ones. They contain all the nutrients necessary for living creatures.