What turtle's ass is red?

Red-bellied turtle, three-line turtle.

1, Red-bellied Turtle: Also known as Red-bellied Turtle, with red stripes on both sides and bottom of its head, it is lively and active, and has the characteristics of crawling and climbing on land.

2. Three-line turtle: the head is slender, the back of the head is sallow, the bottom of the throat is light orange-red, and the back of the head and eyes are prismatic brown patches.