Gopher tortoise facts for kids
Quick facts for kids Gopher tortoise |
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| A gopher tortoise at Lake June in Winter Scrub State Park in Highlands County, Florida, U.S. | |
| Conservation status | |
Scientific classification  |
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| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Order: | Testudines |
| Suborder: | Cryptodira |
| Family: | Testudinidae |
| Genus: | Gopherus |
| Species: |
G. polyphemus
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| Binomial name | |
| Gopherus polyphemus Daudin, 1802
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The gopher tortoise (Gopherus polyphemus) is a special kind of tortoise found in the Southeastern United States. It's known for digging long tunnels underground. These tunnels are super important because they give homes to over 360 other animal species! Because of this, the gopher tortoise is called a keystone species. Sadly, these tortoises are facing dangers like predators and losing their homes. The IUCN Red List of Threatened Species says the gopher tortoise is "vulnerable," which means it needs our help. In some states, they are "threatened," and in others, they are "endangered."
The gopher tortoise belongs to the genus Gopherus. This group includes all the tortoises naturally found in North America. The gopher tortoise is the official state reptile of Georgia and the state tortoise of Florida.
Contents
Why They Are Called Gopher Tortoises
Tortoises in the Gopherus group get their name because they dig big, deep burrows. These burrows are much like the tunnels made by gophers. The scientific name, polyphemus, comes from a giant in Greek myths. This giant, named Polyphemus, lived in a cave.
What Gopher Tortoises Look Like
The gopher tortoise is a land reptile. It has strong front feet perfect for digging. Its back feet are thick and shaped like an elephant's. These features are common for most tortoises. The front legs have tough scales to protect the tortoise while it digs.
Gopher tortoises are usually dark brown to gray-black. Their bottom shell, called a plastron, is yellow. Males and females look a bit different. Male gopher tortoises have a curved-in plastron, while females have a flat one. Also, the front part of a male's plastron is usually longer.
Adult shells are typically 6 to 11 inches (15 to 28 cm) long. Some can grow up to 17.32 inches (44 cm). Their shell is at least twice as long as it is tall. Adult tortoises usually weigh about 4 kg (9 lb), but can range from 2 to 6 kg (4 to 13 lb). They are the only living Gopherus species found east of the Mississippi River.
Gopher Tortoise Behavior
What Gopher Tortoises Eat
Gopher tortoises are herbivores. This means they eat plants. They are also scavengers, eating what they find. Their diet includes over 300 types of plants. They mostly eat broad-leaved grass, regular grass, wiregrass, and legumes.
They also eat other plant parts like shoots, stems, leaves, and pine needles. Sometimes, they enjoy mushrooms and fruits. These fruits include gopher apple, pawpaw, blackberries, and saw palmetto berries. They also eat flowers from certain plants. A tiny part of their diet includes fungi, lichens, dead animals, bones, and insects. Females eat these more often before and after laying eggs.
Young tortoises eat more legumes, which have more protein. They eat fewer tough grasses than adult tortoises. Gopher tortoises usually get water from their food. They only drink standing water during very dry times. In wetter seasons, they might eat more fruits. Fruits give them energy for mating and digging.
How Gopher Tortoises Dig Burrows
Gopher tortoises are famous for their digging skills. They spend most of their time, up to 80%, inside long burrows. These burrows are usually 15 feet (4.6 m) long and 6.5 feet (2 m) deep. Some can be as long as 48 feet (14.6 m) and 9.8 feet (3 m) deep. The size of the burrow depends on the sand and water levels.
These burrows protect tortoises from summer heat, winter cold, fires, and predators. Many activities happen near the burrow, like sunbathing. Burrows are common in longleaf pine savannas. Here, tortoises are key grazers, helping the ecosystem.
Except during mating season, gopher tortoises live alone. They have a small home area and dig several burrows within it. Each tortoise needs about 4 acres (1.6 hectares) to live. Their burrows also help 60 types of vertebrates and 300 types of invertebrates. This includes rare animals like the eastern indigo snake and gopher frog. These animals are called "commensals" because they share the tortoise's home.
Because their burrows are so important, gopher tortoises are called keystone species. Without them, the variety of life in their ecosystems would suffer greatly.
Gopher Tortoise Movement
Gopher tortoises usually move short distances when looking for food. They tend to stay within 100 meters (328 feet) of their burrow. However, when searching for a new feeding spot, they might travel up to 2 miles (3.2 km). Their activity changes with the temperature. They are more active during the warmer spring and summer months.
Gopher Tortoise Life Cycle
Gopher tortoises can live for more than 40 years. One famous tortoise, Gus, is over 100 years old (as of 2026). He has lived at the Nova Scotia Museum of Natural History for 83 years. He is thought to have hatched between 1920 and 1925. Another tortoise in North Texas lived to be 75–78 years old.
Gopher tortoises become adults around 10–15 years old. At this time, their shell is about 9 inches (23 cm) long. Males reach adulthood around 9–12 years, and females take 10–21 years. How fast they grow up can depend on how much food is available. Gopher tortoises prefer to live alone. They only come together during mating season.
Gopher Tortoise Reproduction
Gopher tortoises become ready to mate between 9 and 20 years old. This depends on their sex and where they live. Mating involves special courtship behaviors. During mating season, females lay one group of eggs each year. This happens between April and November. Females can lay up to 25 eggs. Larger females tend to lay more eggs.
These eggs are buried underground for 70–100 days. The temperature of the sand where the eggs are incubated decides if the hatchlings will be male or female. If the sand is warmer than 30°C (86°F), the babies will be female. If it's cooler than 30°C, they will be male. Incubation can last 80 to 90 days in Florida and 110 days in South Carolina.
Gopher tortoises may mate from February through September. The busiest time is May and June. Females usually lay 3–14 eggs, but sometimes up to 25. They lay them in a sandy mound near their burrow entrance. Warmer temperatures help females produce more eggs.
About 90% of egg clutches can be destroyed by predators. Animals like armadillos, raccoons, foxes, and alligators eat the eggs. Fewer than 6% of eggs are expected to grow into tortoises that live for more than a year. As tortoises get older, they have fewer natural predators. Each baby tortoise is about 1–2 inches (2.5–5 cm) long when it hatches.
Gopher Tortoise Social Behavior
Gopher tortoises are mostly solitary animals. However, they are thought to show some social behavior. They live in groups called colonies, similar to highly social animals like prairie dogs. The way their burrows are spread out might show how they relate to each other.
Both male and female tortoises use chemical signals to communicate. These signals come from glands on their chins. Some females have been seen visiting the burrows of a specific female many times. This happens even if other tortoises are nearby. This might be a type of "friendship," though that word is not usually used for animals.
Female gopher tortoises generally stay in the same colony once they move in. Larger males often have burrows next to females in the spring. Males can travel up to 500 meters (1,640 feet) to visit females. Young gopher tortoises sometimes share burrows. However, this can make it harder for them to escape predators. If one young tortoise blocks another, they might even fight.
Protecting Gopher Tortoises
Historical Conservation Efforts
Since 1987, the U.S. Fish and Wildlife Service (FWS) has listed gopher tortoises as "threatened." This applies to tortoises found west of the Mobile and Tombigbee Rivers in Alabama, Mississippi, and Louisiana. In 2009, the FWS suggested adding the eastern population to the threatened list. However, in 2022, the FWS decided not to list the species overall at that time.
The gopher tortoise is listed as "Vulnerable" on the IUCN Red List. This means it faces a high risk of extinction in the wild. Experts have suggested reclassifying it as "endangered" due to growing concerns.
Experts at the University of Florida have identified five main threats to tortoises. These include losing their homes due to human development and poor management. Other threats are people taking them as pets or for food, moving them which can disrupt populations, and diseases caused by moving them.
In Mississippi, fences were built along State Route 63. These fences stop gopher tortoises from being hit by cars. The fences are 3 feet (1 m) high and buried 1 foot (0.3 m) deep. They have special "turnarounds" to guide tortoises back to safety. Since these fences were built, no roadside tortoise deaths have been reported there.
In 2016, the Florida Fish and Wildlife Conservation Commission warned people not to paint tortoise shells. Paint can stop them from getting important vitamins from sunlight. It can also cause breathing problems and let harmful chemicals into their bodies. Painting their shells is also against the law.
Programs that raise young tortoises and then release them have helped. In Georgia, many tortoises were released and tracked. Most stayed in the same area, showing this method can help populations recover.
Gopher Tortoises as Keystone Species
Gopher tortoises are known as a keystone species. This means they are vital to their ecosystem. The Florida Fish and Wildlife Conservation Commission says their burrows provide shelter for 350 to 400 other species. These species include gopher frogs, many types of snakes like the eastern indigo snake, small invertebrates, and burrowing owls.
Many animals that use gopher tortoise burrows are themselves endangered or threatened. So, protecting the gopher tortoise also helps these other species. The biggest threats to gopher tortoises are losing their homes, damage to their homes, and people harming them.
The caterpillars of a moth called Ceratophaga vicinella even eat the shells of dead gopher tortoises. Also, gopher tortoise burrows can help plants grow. They expose mineral soil that is good for seeds to sprout.
Losing Their Homes
Many gopher tortoise homes have been lost. This is due to cities growing, farms, and poor forest management. Tortoises often cross roads, which leads to many being hit by cars. People taking gopher tortoises as pets or for food has also hurt some populations. This is made worse because tortoises take a long time to grow up and don't have many babies.
The Brevard Zoo in Florida says that deaths from cars and people are so high they could stop the population from growing. Tortoises are now protected by state laws. In 2007, Florida made new rules. Developers who build on tortoise land must move the tortoises to a safe place. This could be another part of the construction site or a special protected area.
In Florida, invasive snakes like Burmese pythons can also eat gopher tortoises.
Threats from Natural Disasters
Gopher tortoises are sensitive to changes in their environment. Human activities have disturbed their homes. For example, fires that help keep ecosystems healthy can disrupt plants they need for food. While most research focuses on upland habitats, gopher tortoises also live in sand dune ecosystems near the coast.
These coastal tortoises are threatened by sea level rise and strong hurricanes. More intense storms can destroy their homes. This forces them to move to other places that might not be suitable. Many Florida beaches, where they live, have shrunk due to development. This leaves less wild land for them.
After storms, tortoises have been seen moving to higher ground. They use deeper, abandoned burrows for protection. Researchers worry that coastal tortoises will keep losing their homes. This could lead to more tortoises sharing burrows and more contact with humans. This might reduce coastal populations over time.
People and Gopher Tortoises
Tortoises face dangers from other animals, and also from people. People have eaten gopher tortoises for thousands of years. During the Great Depression, they were sometimes called "Hoover chicken" by people who needed food. Some people saw tortoise meat as a special dish or a free meal.
Hunting gopher tortoises or having their meat or shells is now against the law. However, some hunting still happened in the past, which hurt tortoise populations. In 2006, police found tortoise meat in a man's fridge after seeing empty shells. In some parts of Alabama, tortoises were once considered a game animal, but hunting them is now forbidden.
Gopher tortoises were also kept as pets. This stopped them from having babies in their natural homes. They were even raced in "tortoise races," but this was banned in Florida in 1989. Moving a tortoise can harm its original environment. Also, tortoise races can spread diseases among the animals. If an infected tortoise is returned to the wild, it could make other tortoises sick.
Climate Change Impacts
Climate change is another challenge for gopher tortoises. It changes their habitat, but they are adapting. The FFWC says that warmer temperatures and changing rainfall might increase invasive species. These new species could take over plants that tortoises need for food. Invasive species can also break up habitats and stress tortoises.
Warmer temperatures also cause sea level to rise and more extreme weather. Periods of heavy rain or drought can reduce available living areas. A 1-meter (3.3 feet) rise in sea level could mean losing 20% of protected lands. It could also mean losing 30% of natural habitats. However, a rise of this much would take many centuries.
Rising sea levels affect coastal areas. Species might move inland as less land is available. This can spread diseases or disrupt food chains and reproduction.
Habitat Loss and Fragmentation
In 1987, human growth and activities in Mississippi, Louisiana, and Alabama caused tortoise numbers to drop sharply. The FWS listed them as "endangered" in those areas. While populations also declined in Florida, Georgia, and South Carolina, they were not listed as threatened then. However, in recent years, habitat loss is increasing. Southern states are growing, and more highways are being built. The Southeast saw a 20% increase in human population between 1990 and 2000.
One of the best homes for gopher tortoises is the longleaf pine ecosystem. These forests have sandy soils that drain well, perfect for tortoises. Longleaf pine forests also have many low-growing plants for food and open spaces for eggs to hatch. Since European settlement, longleaf pine forests have shrunk by about 96%. This has led to an 80% drop in gopher tortoise numbers.
Over 80% of gopher tortoise habitat is now on private land. While some managed forests help, pine plantations with many trees can become too shady. This reduces the ground plants tortoises need. These habitats also rely on natural fires. When habitats are broken up, natural fires are affected, which lowers habitat quality.
Four large areas still offer hope for protecting tortoise habitats and their biodiversity. These are De Soto National Forest, Eglin Air Force Base, Apalachicola National Forest, and Okefenokee Swamp in Florida. These places can help restore forests and animal communities. Bringing back natural fires and floods would also help these plant and animal communities.
If Florida's population doubles, 7 million acres (28,000 km²) of land could be developed. This is the size of Vermont. This would mean more competition for water between animals and humans. The tortoise's slow reproduction rate makes it more vulnerable to extinction.
Habitat fragmentation means their homes are broken into smaller pieces. Railways can act as barriers for tortoises. They cross railways much less often than expected. Tortoises also struggle to escape if they get onto railway tracks. Trenches dug under railways could help them cross safely. Since railways are common, these trenches could help connect tortoise populations.
Gopher Tortoise Diseases
Gopher tortoises can get upper respiratory tract diseases (URTDs). These are caused by tiny germs like bacteria and viruses. Symptoms include runny noses, watery or gooey eyes, and swollen eyelids. One common bacterium, Mycoplasma agassizii, can exist in tortoises without them showing symptoms.
Scientists don't fully understand why some tortoises get very sick and die, while others live for years. There is no cure for URTD. Studies on desert tortoises showed URTDs could cause population declines years after infection. However, similar long-term studies on gopher tortoises are still needed.
One study in Florida found that tortoises with URTD antibodies were less likely to die over a few years. This might mean they survived an initial infection and then had a long-term illness. More research is needed to fully understand how URTD affects gopher tortoises.
Another study found a bacterium called "candidatus Anaplasma testudinis" in many Florida gopher tortoises. This bacterium can cause anemia and damage red blood cells. It can spread through ticks or other carriers. Since it was common in the studied tortoises, it likely affects wild populations often. This is an important issue for conservation efforts.
Protecting Longleaf Forests
Protecting the longleaf pine ecosystem is key to saving the gopher tortoise. This ecosystem provides special conditions like sandy, nutrient-poor soil for their homes. Longleaf pine trees can live for hundreds of years. Conserving these forests gives gopher tortoises the natural habitat they need. The gopher tortoise once lived across most of the longleaf pine forests in the southeastern United States.
Efforts to replant these forests have been successful. Environmental groups and private landowners are working together. They aim to protect wildlife while also using the land for crops. These groups help landowners get funding to preserve wildlife on their property. Most land in the East is privately owned.
Landowners use "prescribed burns" to restore healthy habitats. These controlled fires help reduce invasive species that threaten tortoises. Invasive plants like cogongrass and fire ants can harm tortoise habitats and kill their eggs. Prescribed fires help create good ground conditions for tortoises and their eggs. They also help maintain the variety of life in longleaf pine ecosystems.
See also
In Spanish: Gopherus polyphemus para niños
