Armadillo
Armadillo Facts
| Size | 30-39 inches (75-100 cm) |
| Speed | Up to 30 mph (48 km/h) |
| Weight | 4.2 ounces to 72 pounds (120 g to 33 kg) |
| Lifespan | 4-30 years |
| Food | Ants, termites, insects, spiders, fruit, plants |
| Predators | Jaguars, coyotes, bobcats, bears, wolves |
| Habitat | Central and South America |
| Order | Cingulata |
| Family | Armadillos |
| Scientific name | Dasypodidae, Chlamyphoridae |
| Characteristics | Mammal with a bony and horn-like armored shell |
Main Characteristics
Armadillos are mammals with a protective armored body, including their head and tail. This armor provides excellent defense against predators, making them effectively 'bulletproof.' When threatened, the three-banded armadillo can even curl up into a ball when it is scared, similar to a hedgehog. Their armor gives them a lizard-like appearance, which is why they are frequently mistaken for pangolins. Additionally, armadillos are known for two notable traits: they often give birth to quadruplets and can carry leprosy. They also hold two records: the longest claws in the world and the most teeth for a land mammal.
Name
Spanish Origin
The armadillo got its name from Spanish sailors. The term 'armadura' translates to 'armored' in Spanish, and 'illo' is a diminutive suffix, so it essentially means 'little armored one.' The Aztecs referred to it as 'āyōtōchtli,' which means 'turtle rabbit.'
"Banded" Animals
The armadillo has numerous bands that overlap around its midsection. This is why some species of armadillos are named after them, such as the nine-banded armadillo. Both the bands and the rest of the shell are made up of many individual scutes, composed of bone and covered with a tough, horn-like material. The number of these bands varies depending on the species.
Species
There are 60 species of armadillos. The most well-known include the nine-banded armadillo, the giant armadillo, the dwarf armadillo, the pink fairy armadillo, the six-banded armadillo, and the hairy armadillo.
Distribution and Habitat
Armadillos are native to the USA, Central America, and South America. They inhabit a variety of environments including grasslands, rainforests, wetlands, savannas, semi-deserts, and steppes. The key requirement is loose, sandy soil where they can burrow.
Way of Life
Most armadillos are nocturnal. They tend to be solitary creatures, coming together only during mating season. However, in colder weather, they sometimes gather in their underground burrows to keep warm.
Anatomy and Appearance
Size and Weight
The largest armadillo is the giant armadillo, measuring 30-39 inches (75-100 cm) in body length and weighing 41-72 pounds (19-33 kg). Its tail adds another 20 inches (50 cm). Some particularly large giant armadillos can weigh up to 119 pounds (54 kg). On the other hand, the smallest armadillo is the pink fairy armadillo, which only grows to about 3.5-4.5 inches (9-11.5 cm) in length and weighs a mere 4.2 ounces (120 grams).
Appearance
Armadillos have a pointed snout, short legs, a long tail, sharp claws, large ears, and hard, armor-like shell that covers their entire body, head, and tail. They are usually gray or brown, with some even being pink or yellowish.
Hair
Armadillos may appear to be bare, but they actually have numerous long, coarse hairs on their sides and belly. These stiff and sturdy hairs can be likened to bristles. At night, when these creatures are active, their hairs assist them in navigating their surroundings. Although their eyesight is quite poor, they can accurately determine their location by feeling rocks or trees with their hairs.
Claws
Armadillos possess long claws that they use to dig in the ground for food or to burrow themselves in for protection against predators. The giant armadillo has the longest claws in the world, reaching lengths of up to 8 inches (20.3 cm), allowing it to break open even the hardest termite mounds.
Teeth
Armadillos possess short, flat, cone-shaped teeth that allow them to crush small animals and plants. The giant armadillo has up to 100 teeth, making it the land mammal with the most teeth!
Tongue
Similar to the anteater, the armadillo also has a very long tongue, which it uses to extract prey from the ground.
Shell
Their armor covers most of the armadillo's body, including its head, tail, and sometimes even its legs, making it resemble a large lizard or another type of reptile. Its numerous scutes often lead to confusion with the pangolin.
What Is the Shell Made of?
Unlike the horn of a rhinoceros, which is made from the same material as our hair and nails, the armadillo is different. This makes it unique among mammals. Its shell is composed of countless small bony plates covered by a thin layer of horn-like material, similar to our hair and nails.
What Is the Purpose of a Shell?
The shell makes the armadillo 'bulletproof': it shields against thorny plants, sharp rocks, keeps parasites away, and makes it harder for predators to catch them.
Diet
Armadillos are omnivores. They mainly eat ants and termites, but they also enjoy a variety of other insects and spiders like cockroaches, wasps, and snails, as well as scorpions. Sometimes, they even munch on fruits, plants, eggs, small reptiles, and amphibians. They won't turn down carrion either.
Behavior
Digging
Armadillos are great at digging because they have long, sharp claws and strong front legs. They dig for two main reasons: to find food or to create a burrow where they can hide and rest. Their burrows are also popular with other animals, like snakes, rabbits, and skunks, who use them for shelter.
Sleeping
Armadillos spend a lot of time resting. They sleep around 18 hours a day.
Cuddling to Keep Warm
Armadillos struggle to maintain their body temperature effectively. They lack sufficient body fat, and their shells are too thin to provide warmth. As a result, they spend their nights in burrows. When temperatures drop significantly, multiple armadillos may gather in one burrow and snuggle together, despite their solitary nature.
Defense
Run or Hide
When an armadillo feels threatened, it either quickly scurries away or burrows into the soft sand for protection. This way, its sensitive body parts are safely hidden underground while its shell provides excellent protection from above.
Curling Up
The three-banded armadillo can curl up into a ball when threatened. With armor on its head as well, it can form a complete sphere.
Senses and Abilities
Senses
Armadillos have poor eyesight, but their sense of smell is exceptional. Their sensitive nose aids them in locating prey.
Swimming
How does an armadillo cross a river? Most species hold their breath and walk along the riverbed to the other side, which only works if the river isn't too wide. The nine-banded armadillo has a different approach: it fills its stomach and intestines with air and floats across the water like a little balloon.
Climbing
Armadillos may appear to spend their entire lives on the ground due to their flat, stocky body shape, but surprisingly, they are quite good at climbing. Small fences and trees are no obstacle for them.
Body Temperature
Armadillos maintain a body temperature of 91.4-94.1 degrees Fahrenheit (33-34.5 degrees Celsius), which is quite low compared to most mammals that typically have a temperature around 98.6 degrees Fahrenheit (37 degrees).
Armadillos Can Carry Leprosy
Armadillos have a weak immune system and a low body temperature, making them susceptible to leprosy. Leprosy is an infectious disease caused by bacteria, and humans can also contract it. Those affected do not feel pain, cold, or heat. As a result, they often overlook their injuries, which can lead to further infections. Today, leprosy is easily treatable, but it remains a serious issue in developing countries where medical care is often inadequate.
Are Armadillos Dangerous?
Armadillos are not aggressive, but they can give you rabies and leprosy if touched. So, it's best to keep your distance!
Life Expectancy
In the wild, armadillos can live between 4 to 30 years. The oldest recorded armadillo was a three-banded armadillo that lived for 36 years and 9 months.
Enemies and Threats
Natural Enemies
Their main adversaries include jaguars, coyotes, bobcats, wolves, bears, large hawks, and other birds of prey.
Human Impact
Hunting
Armadillos are hunted for their shells, which are used to make clothing, accessories, or musical instruments. Farmers kill or poison them because they unintentionally damage crops while digging in the soil for food.
Road Traffic
Armadillos often cross roads in search of food, but sadly, they frequently get hit by cars and lose their lives.
Loss of Habitat
The biggest threat to armadillos is the destruction of their habitat. In South America, vast areas of rainforest and wetlands are cleared every day to make way for agricultural land for animal feed or livestock. As a result, armadillos are losing more and more of their living space.
Delicacy and Remedy
In several Asian countries, including China, armadillos are considered a delicacy, although this is a rare occurrence. More commonly, pangolins, which resemble them, are hunted for food and used in traditional Chinese medicine as a 'remedy,' despite the lack of scientific evidence for their effectiveness.
Conservation Status
Out of the 60 species of armadillos, two are considered endangered: the giant armadillo and the three-banded armadillo.
Importance for the Ecosystem
Armadillos primarily feed on insects, helping to keep their populations in check. Many of their prey are pests, making them beneficial creatures. However, while digging, they can also damage crops, which is why they are sometimes considered pests. They play a crucial role for other animals, as their burrows provide shelter for over 20 different species. These burrows also help aerate and drain the soil.
Reproduction
Gestation Period and Birth
After mating, the gestation period varies by species and lasts between 2 to 5 months. The shell of a baby is soft and flexible at birth, but it hardens within a few weeks.
Raising the Young
The mother nurses her babies for a period of 2 to 4 months. After about a year, the young ones become independent and start their own journeys.
Quadruplets
Among all mammals, the nine-banded armadillo is unique in that it almost always gives birth to quadruplets. From a single fertilized egg, four genetically identical embryos develop, resulting in four completely identical babies.
Evolution and History
Around 20 million years ago, a massive armadillo known as the Glyptodon roamed the Earth. Weighing up to 3,086 pounds (1,400 kg) and measuring over 10 feet (3 meters) in length, it was roughly the size of a small car. This creature had a spiky, club-shaped tail. Unfortunately, it went extinct at the end of the last Ice Age, approximately 12,000 years ago.
Fun Facts
A Nine-Banded Hare?
The scientific name of the nine-banded armadillo is 'Dasypus novemcinctus'. 'Dasypus' comes from Greek and means 'hare'. The Latin words 'novem' and 'cinctus' translate to 'nine' and 'belt'. So, is there really just a hare hiding under the nine-banded shell of this little creature? Just kidding!
The Armadillo Is Related To:
- Giant Anteater
- Sloth
Animals in the Same Biome:
Sources:
- „Ecosystem services provided by armadillos“ (https://onlinelibrary.wiley.com)
- "A study on the structure and mechanical behavior of the Dasypus novemcinctus shell“ (https://www.sciencedirect.com)
- „Most fertile animal for quadruplets“ (https://www.guinnessworldrecords.com)
- „Longest-lived armadillo species“ (https://www.guinnessworldrecords.com)
- „Largest claws on a living animal“ (https://www.guinnessworldrecords.com)
- „Most teeth for a land mammal“ (https://www.rote-liste-zentrum.de)
- „The armadillo: a model for the neuropathy of leprosy and potentially other neurodegenerative diseases“ (https://pmc.ncbi.nlm.nih.gov)
- "Evidence of zoonotic leprosy in Pará, Brazilian Amazon, and risks associated with human contact or consumption of armadillos“ (https://journals.plos.org)
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