THE ANIMAL FILES

Red-eared slider

Trachemys scripta elegans

Those red “ears” are markings, not little external ears.

The red-eared slider is recognised by the coloured patch behind each eye. Its partly webbed feet, retractable limbs and flattened shell connect life in water with time spent out on logs or rocks.[1]

Follow the evidence ↓
Red-eared slider
Image: Vaiasgaea · Commons · CC BY-SA 4.0
Marking
Red patches behind the eyes[1]
Movement
Partly webbed feet aid swimming[1]
Temperature
Warmed by the surrounding environment[1]

A name with two clues

The red patch occupies the area where an external ear might be expected, but the turtle has no visible outer ear. “Slider” refers to its quick departure from resting places into water. Neither word describes a separate anatomical ear.[1]

A shell changes with age

Young animals may have bright green shells; older ones often become darker, with olive or brown tones. Markings vary, and some older males become so dark that the familiar head stripe is difficult to see.[1]

Basking is temperature regulation

Body temperature depends on external conditions. Basking raises it before further activity. Adult males tend to be smaller than females and have longer front claws, which also take part in courtship displays.[1]

A COMMON MIX-UP

Does a faded red patch rule out a red-eared slider?

No. Age and darkening can make the stripe less conspicuous. A single colour patch does not capture all variation within the animal.[1]

TRY A LITTLE REASONING

Why might the turtle leave the water to bask?

Reveal the explanation

External warmth helps raise its body temperature. Leaving the water can therefore be part of regulating the conditions for activity.[1]

Sources & editorial notes

Adapted and translated from the cited Wikipedia revisions, with source-linked reasoning. Image credit and licence are listed separately above.

Adapted and translated from Wikipedia contributors; exact revisions are linked below. CC BY-SA 4.0

  1. Wikipedia contributors — Red-eared slider (fixed revision; adapted and translated)
  2. NCBI Taxonomy — Trachemys scripta elegans (identity and classification)

Last fact check:

One discovery leads to another

Common box turtleA hinge turns the lower shell into a closing door.Terrapene carolina ↗Loggerhead sea turtleStrong jaws meet a life that begins among floating weeds.Caretta caretta ↗Green sea turtleThe green in the name is not a promise about the shell.Chelonia mydas ↗