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Pond Slider (Red-Eared and Yellow-Bellied Slider)
This is the turtle on the log. If you have a pond, a retention basin, a canal, or a golf course water hazard anywhere in the eastern two thirds of the country, the animals lined up on the nearest fallen tree, sometimes stacked on top of each other, are almost certainly pond sliders. They are not the animal people are afraid of. Sliders bask, and a basking turtle is not a snapping turtle, which is the single most useful thing to know for anyone deciding whether the turtle in the yard is dangerous. What makes the pond slider genuinely complicated is not risk to people. It is that the pet trade turned one subspecies of it, the red-eared slider, into one of the most widely released animals on earth, and those released pets are now interbreeding with the native yellow-bellied slider across the Southeast and the Mid-Atlantic. The regulations attached to this species are almost entirely about that problem, not about bites.

Seasonal Timeline

Sliders are diurnal and active in the warm months, basking hardest through the middle of the morning, and they overwinter underwater in soft bottom mud, muskrat burrows, or simply sitting on the bottom. The behavior that puts one on a lawn or driveway is nesting, and that runs roughly April through July.

Peak, SoutheastMay–Jul
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Sliders are diurnal and active in the warm months, basking hardest through the middle of the morning, and they overwinter underwater in…

Basking is the seasonal behavior worth understanding, because it is thermoregulation and it is measurable. A Florida Museum of Natural History study of yellow-bellied sliders at a north Florida sinkhole pond used temperature telemetry to show that an adult turtle sitting out on a log could raise its body temperature at least 10 degrees C above the near-surface water it had just left. That study identified thermoregulation as the primary function of basking from four separate behavioral lines: the way a basking turtle orients its body and extends its head, legs, and even the digits of its rear feet; the fact that a turtle will stay on a site after it falls into shade but will rarely climb out onto a spot that is already shaded; the way basking frequency and duration shift inversely as air and water temperature and sunshine decline; and the switch to submerged basking sites or floating in warm surface water once the water itself is warm enough.

Two findings from that work cut against what most people assume. Basking is not a daily requirement. Some individuals basked as many as five times in one day in good weather, while a considerable share of the same population did not bask at all that day. And the numbers move with water temperature rather than the calendar: atmospheric basking peaked at a daily mean water temperature of 28.5 degrees C, while aquatic basking increased as water temperature climbed toward 31.5 degrees C. Basking duration also scales with body size, so a large old female and a young turtle in the same pond are not on the same schedule.

Mating timing is genuinely disputed across sources. A university museum account gives a breeding season beginning in April and usually running through late October, extending into December in ideal weather. Virginia's state wildlife agency describes mating in spring, fall, and winter for the yellow-bellied slider and in any season but summer for the red-eared slider. Nesting is far more consistent across sources, April through July, and nest construction usually happens at dusk and at night.

Where They're Found

Eight regions carry this animal, and the native versus introduced status is different in each.

Native range: Southeast, South Central, and Midwest. The yellow-bellied slider is the Atlantic-slope native, with an indigenous range covering southeastern Virginia south through the Coastal Plains of the Carolinas, Georgia, northern Florida, and eastern Alabama. The red-eared slider's own indigenous range is the Mississippi River drainage system: broadly across the midwestern states, east as far as West Virginia with a disjunct relict population in southern Ohio, west to eastern New Mexico, and south below the Rio Grande into northeastern Mexico. A third subspecies, the Cumberland slider, occupies only eastern and northeastern Tennessee and the extreme southwestern corner of Virginia.

Introduced and established: Northeast, Southwest, California, Pacific Northwest, and Hawaii. The U.S. Geological Survey's nonindigenous species database describes reproducing, thriving red-eared slider populations in New York, New Jersey, and Pennsylvania, a well established and invasive population across much of northern and central Maryland, and animals surviving winters as far north as Cumberland and Kennebec Counties in Maine, though reproduction there is unconfirmed. Nonindigenous populations in western Texas, New Mexico, and Arizona appear established, with the Rio Grande drainage population in New Mexico described as probably invasive. In California and in Washington the species is not just established but explicitly called invasive, and in Washington it is named a potential threat to the western pond turtle, a declining species endemic to the Pacific states. Oregon is worth stating precisely, because the federal wording covers it in a shared sentence: USGS groups Oregon with California and Washington as well established in numerous localities, but reserves the phrase clearly invasive for the latter two. Oregon's own Department of Fish and Wildlife closes that gap independently, stating that the state has two native turtles, the western pond turtle and the western painted turtle, and naming the red-eared slider among the invasive, non-native turtles competing with them for food, habitat, and nesting sites. USGS notes that California's extensive network of manmade canals and irrigation ditches may be exactly what lets the species colonize new water so quickly.

Hawaii carries an established population. USGS states the red-eared slider is established in Hawaii, though it is unclear whether it is particularly invasive there. The specimen record behind that statement is specific: Kawainui Marsh and the Kaelepulu Stream drainage inland from Kailua on windward Oahu, collected in 1996, pathway recorded as released pet, status recorded as established, with the field note that hatchlings and juveniles are routinely observed. A second established Oahu record dates to 1997.

Two absences. Alaska is confirmed absent. Florida's state wildlife agency states plainly that the red-eared slider has been introduced via the pet trade to every state except Alaska, and no Alaska record appears in the federal nonindigenous occurrence data. The Mountain West is unconfirmed. USGS records that all red-eared sliders found in Colorado appear to be waifs from pet releases, which is why the standard reference on Colorado's herpetofauna does not list the species at all. Scattered released pets are not an established population, and no agency source confirms one in Colorado, Utah, Wyoming, Montana, Idaho, or Nevada. Treat the Mountain West as unconfirmed.

On the ground, the habitat point that matters is that manmade water counts. Sliders want quiet, sun-exposed water with soft substrate, aquatic plants, and abundant basking structure, typically about 2 to 3 feet deep. They occupy ponds, lakes, marshes, swamps, sloughs, oxbows, and slow rivers, and they occupy retention and stormwater ponds, irrigation ditches, canals, golf course water hazards, and city park ponds every bit as readily. They also tolerate brackish water. If there is a log, a stump, a rock, a dock edge, or an aerator pump breaking the surface, that is where the turtles will be.

Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia West Virginia Wisconsin Wyoming District of Columbia District of Columbia

State-regulated - verify locally

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