How do you tell the difference between male and female red-eared sliders (detailed introduction)? Male and female sliders have different front claws. Males have longer front claws, while females have shorter ones. Males have thicker and slightly longer tails, while females have thinner and shorter tails. This difference is obvious when comparing the tails. In most cases, even mature females weigh less than 500 grams, have sparse abdominal markings, and their carapaces turn black. Males, on the other hand, reach 1000-2000 grams after maturity, have dense abdominal markings, and their carapaces don't change much, remaining the same color.

The cloaca refers to the distance between the excretory opening and the back of the plastron. In females, the distance is shorter and closer, while in males, it's slightly longer and farther apart.

There's a slight difference between the male and female carapaces: the female's carapace is slightly wider but shorter, while the male's is longer but narrower.

Flipping a red-eared slider over reveals the difference between male and female. The female's plastron is flat in the middle, without a concave indentation, while the male's has a slight concave in the middle. The most detailed method for sexing red-eared sliders is here.

Typically, it's difficult to tell the gender of juveniles, especially those weighing less than 250 grams. Even if the shopkeeper tells you to identify juveniles by their markings and color, there's no scientific basis for this and it's not very reliable.