Encyclopaedia
ReptileFreshwaterSemi-aquaticIntermediate
©AI Generated·Proprietary
Eastern Mud Turtle
Kinosternon subrubrum
An appealing, small semi-aquatic mud turtle native to North America, widely known for its generally docile nature and excellent suitability for well-structured, shallow-water indoor enclosures.
Class:Testudines
Order:Testudines
Family:Kinosternidae
Genus:Kinosternon
Species:Kinosternon subrubrum
Share
Check out Eastern Mud Turtle on Atlarium
Water Temperature
10 - 28 °C
pH Value
6.5 - 8
Environment
Freshwater / Semi-aquatic
Humidity
70 - 90 %
Day temperature
24 - 32 °C
Night temperature
20 - 24 °C
Adult size
10.2 cm
UVB
Medium
Species description
Geographical Origin and Habitat: Kinosternon subrubrum is native to the eastern and southern regions of the United States, with a geographical range stretching from Long Island, New York, south to Florida and west to Texas. It inhabits a variety of shallow, slow-moving water bodies, including freshwater marshes, ponds, ditches, swamps, and creeks with muddy bottoms and dense aquatic vegetation. It can also tolerate brackish coastal waters.
Taxonomy and Genetics: Belonging to the Kinosternidae family and the genus Kinosternon, three subspecies are historically recognized: K. s. subrubrum (eastern mud turtle), K. s. hippocrepis (Mississippi mud turtle, identified by yellow head stripes), and K. s. steindachneri (Florida mud turtle). Their genetics support high tolerance for drought conditions, enabling them to estivate on land.
Behavior and Habits: This semi-aquatic turtle is diurnal, relatively shy, and primarily bottom-dwelling (benthic). Rather than swimming in open water, it prefers to walk along the muddy substrate of its habitat. During cold winter months or hot, dry summer droughts, it migrates to land to bury itself in leaf litter or mud to hibernate or estivate.
Morphology: It features a smooth, oval carapace lacking prominent keels in adults, varying in color from dark brown and olive to black. The plastron is hinged with two functional hinges, allowing the turtle to close its shell partially to protect its head and limbs from predators. Adults are small, measuring only 7.5 to 12 cm in length.
Care, breeding and tankmates
Terrarium Setup: An aqua-terrarium of at least 80x40x40 cm is required for a single adult. The water area should comprise approximately 70% of the tank, with a shallow depth of 15-20 cm so the turtle can easily reach the surface to breathe by stretching its neck. The land area must be dry, easily accessible, and filled with a sandy soil mix for digging.
Lighting and Heating: The land area must feature a basking light creating a hot spot of 30-32 °C, alongside a 5% UVB lamp essential for shell development. Water temperature should be maintained between 22 and 25 °C using a protected heater. Turn off all lights at night to replicate natural diurnal cycles.
Humidity and Hydration: Maintain air humidity around 60-70% in the land section. Provide a damp retreat on the land side to allow the turtle to burrow, simulating its natural terrestrial behavior. High-quality water filtration is vital, and the water must be dechlorinated and kept free of accumulated organic waste.
Feeding and Supplementation: Primarily carnivorous. In captivity, feed them earthworms, snails, small feeder fish, fresh shrimp, crickets, mealworms, and high-quality commercial turtle pellets. Dust food with calcium and vitamin D3 twice a week for growing juveniles, and once a week for adult specimens.
Compatibility: A solitary species that can be territorial. They should be housed individually as keeping multiple turtles in confined spaces often leads to aggressive biting of limbs and tails. Any small fish kept in the water section will likely be eaten, and live aquatic plants may be dug up or shredded.
Health and Common Diseases: Susceptible to Metabolic Bone Disease (MBD) due to inadequate UVB lighting or lack of dietary calcium, and shell rot or fungal skin infections caused by poor water quality. An oversized external canister filter is essential to maintain water hygiene. Handle with care as they can bite if defensive.
Geographic Origin and Distribution
Kinosternon subrubrum is native to the eastern and southern regions of the United States, with a geographical range stretching from Long Island, New York, south to Florida and west to Texas. It inhabits a variety of shallow, slow-moving water bodies, including freshwater marshes, ponds, ditches, swamps, and creeks with muddy bottoms and dense aquatic vegetation. It can also tolerate brackish coastal waters.
Origin
North America
Reptile profile
- Diet
- No verified data available
- Life expectancy
- No verified data available
- Adult size
- 10.2 cm
- Lifestyle/Microhabitat
- No verified data available
- Activity cycle
- No verified data available
- Sociality
- No verified data available
- Reproduction
- No verified data available
- Handling tolerance
- No verified data available
- Brumation
- No verified data available
- Molting
- No verified data available
The catalog's scalar value is 10.2 cm. The ReptTraits v1.2 source reports a maximum adult measurement of 10.2 cm for this species, recorded as straight carapace length (SCL). These figures are not interchangeable: the first is the profile's editorial reference, whereas the second is a published maximum under a specific measurement convention; differences among sources can reflect sex, population, life stage and measuring method.
Image gallery
Licensed images linked to the species or, when marked, to the closest representative taxon.
Related species
Recommendations grouped by close relatives, companion choices, and similar care.
