When I first got my RES turtles, Mike and Frida, I thought I knew what to expect. They bask, they swim, and they eat. But then I noticed the little things: the way they follow my finger from inside the tank, or the funny little yawn they do to expel water. It’s those small, surprising details that make them so fascinating. Therefore, this article is a collection of my favorite “little things”—the Red Eared Slider facts that make these common turtles so uncommonly cool.
An Invasive Superstar: Where Do They Actually Belong?
Unlike many other turtles that are threatened, RES turtles are considered a highly invasive species. In fact, They are far from being endangered. They aggressively compete with native turtles for food, and because they are such excellent swimmers, they tend to dominate their new environments. Consequently, these turtles now inhabit ponds, lakes, streams, and creeks all over the world.
Their global spread is largely due to irresponsible owners releasing them rather than finding them new homes. Therefore, it is essential to never release a captive turtle into the wild. On a happier note, their active and playful nature makes them incredibly entertaining to watch in a proper home. They appreciate climbable structures, so be sure to provide plenty of plants, rocks, or decorations.
What Do Red Eared Slider Turtles Eat?
A balanced diet is key to a healthy turtle. Generally, there is a simple guideline that keeps your turtle healthy:
| Age | Protein | Vegetables | Frequency |
| Under 1 Year | 50% | 50% | Daily |
| Over 1 Year | 25% | 75% | Veggies Daily / Protein 2x Week |
Typically, a turtle can consume a single portion of protein within 5 minutes. Furthermore, the portion of vegetables should roughly match the size of the turtle’s shell. Since a varied diet is crucial, here are some great menu options:
- Safe Aquatic Plants: Anubias, Amazon Swords, duckweed, java moss, and red ludwigia.
- Protein Sources: Freeze-dried shrimp or krill, frozen bloodworms, fresh shrimp, captive-bred snails, and live bearer fish (guppies, mollies, platies).
- Vegetables (Staples): Collard greens, green beans, green leaf lettuce, mustard greens, zucchini.
- Fruits (Treats Only): Apples (skinned), berries, figs, mango, melon, pear.
However, your turtle may not show much enthusiasm for vegetables at first. To encourage them, try mixing the vegetables with their favorite foods or offering smaller bites. Additionally, soaking the vegetables can help soften them. Remember to be patient, as some turtles are picky eaters and need time to adapt to new foods.
Important Red Eared Slider Facts: Size and Lifespan
How big do they get?
One of the most important facts to know is their adult size. Females can grow surprisingly large, reaching up to 12 inches (30 cm) in shell length. Males are typically smaller, staying between 7 to 9 inches (15-23 cm).
What is their actual lifespan?
In the wild, they might live for 20 to 30 years. However, in captivity, they can live for 50 to 70 years. This is a lifelong commitment!
Cool Fact: A baby turtle’s sex is determined by the nesting temperature. Specifically, if the nest is cooler (22-27°C), males are born. Conversely, females are born under warmer nesting temperatures.
Do They Change Color Over Time?
Yes, they do. In young turtles, the carapace (top shell) color is a bright leaf green. As They age, this color darkens significantly. Eventually, it turns into a dark olive green or even brown.
Another cool fact: The plastron (bottom shell) is always yellow with dark, paired markings. Amazingly, each turtle has its own unique plastron print, just like a fingerprint!
Why Are They Called “Red Eared Sliders” If They Don’t Have Ears?
They get their name from the famous red stripe located where their ears would be. Interestingly, these red stripes can lose color and fade over time. Furthermore, in young turtles, having bright red stripes is often a sign of a healthier immune system.
While they don’t have external ears, they do have an internal middle ear that is highly sensitive to vibrations.
Turtle Anatomy 101:
- Carapace: The upper turtle shell.
- Plastron: The lower turtle shell.
- Scutes: The polygon-shaped plates that cover the shell.
- Keel: The ridge that runs down the center of a turtle’s back.
Health and Care: Keeping Your Turtle Thriving
To keep your turtle healthy, follow these essential rules:
- Perform regular water changes to maintain a healthy biological cycle.
- Provide lots of plants (fake or real) for security.
- Always provide calcium and Vitamin D3 supplements.
- Keep the water heated to 75-80°F (24-27°C).
- Ensure the basking area is hot, around 85-95°F (29-35°C).
- Crucially, you must provide both a heat lamp AND a UVB lamp.
Do They Shed?
Yes, but slowly. Red Eared Sliders shed their skin and scutes a bit differently than other reptiles. Instead of shedding all at once, they shed one scute or patch of skin at a time. If you find a scute that looks stuck, try to brush it gently in warm water. However, never pull it off by force; instead, take it to a vet if it won’t come off.
What is “Dry Docking”?
This is a specialized treatment for several turtle diseases. Essentially, you quarantine the turtle without any water. The goal is to keep your turtle warm and completely dry to start the healing process for external wounds, shell rot, or respiratory issues.
How to Dry Dock:
- Use a separate 25-gallon (50-liter) plastic tub.
- Provide a heating lamp, UVB lamp, thermometer, and hygrometer.
- Line the bottom with paper towels.
- Importantly, allow the turtle to soak in a separate container of water for about 2 hours a day to stay hydrated.
Carrot Baths For Turtles: True or Myth?
Some hobbyists claim it’s a myth, while others swear it works for their turtles. It is believed to help with Vitamin A deficiency. Here’s how it’s done:
Peel and boil (or steam) 4 carrots. Blend them very well, then add cooled water to thin the puree until it looks like baby food. Next, check the temperature to ensure it’s safe (around 80°F / 27°C). Finally, let your turtle soak in this mixture for 30 to 40 minutes.
Red Eared Slider Turtles FAQ
Red Eared Sliders live 50 to 70 years in proper captive conditions. Wild specimens average 20 to 30 years due to predation and harsh weather. This multi-decade lifespan demands serious commitment, since the turtle will outlast many household pets and potentially follow children into adulthood.
Red Eared Sliders rank among the world’s most invasive turtle species due to global pet trade releases. They outcompete native turtles for basking sites and food across ponds, lakes, and rivers worldwide. Their adaptability and aggressive feeding behavior dominate ecosystems on every continent except Antarctica.
Releasing a Red Eared Slider into the wild devastates local ecosystems and often violates local wildlife laws. Captive turtles displace native species, spread foreign pathogens, and rarely survive harsh conditions outside their natural range. Rehoming through reptile rescues or surrender programs remains the only ethical solution.
Red Eared Sliders earn their name from the bright red stripe positioned where external ears would appear. The species lacks external ear openings but uses an internal middle ear sensitive to vibrations. The red stripe fades with age and brightness often indicates juvenile immune system health.
Female Red Eared Sliders grow up to 12 inches in shell length while males stay between 7 and 9 inches. This size difference becomes obvious around 4 years old when both sexes reach maturity. Females also develop wider, heavier bodies to accommodate egg production capacity.
Red Eared Sliders shed their scutes one piece at a time rather than in a single event. The translucent scutes peel off the carapace as the turtle grows, revealing fresh keratin underneath. Forcing stuck scutes off causes permanent shell damage and requires veterinary attention immediately.
Dry docking quarantines a sick Red Eared Slider out of water to treat shell rot, skin wounds, or respiratory infections. The setup uses a plastic tub with heating, UVB, and paper towel substrate. Daily two-hour water soaks prevent dehydration during the recovery process.
Sources
- Global Invasive Species Database
http://www.iucngisd.org/gisd/species.php?sc=71 - LafeberVet
https://lafeber.com/vet/basic-care-red-eared-slider/ - National Library of Medicine
https://pubmed.ncbi.nlm.nih.gov/11443141/ - AnAge Database
https://genomics.senescence.info/species/entry.php?species=Trachemys_scripta - MSD Veterinary Manual
https://www.msdvetmanual.com/exotic-and-laboratory-animals/reptiles/disorders-and-diseases-of-reptiles
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