Why are there patterns on the turtle's back?

The pattern on the turtle's back is the protective color for the turtle's survival. Can be the same color as his back shell and play a protective role in the environment. It is distributed in the middle and lower reaches of the Yangtze River and inhabits rivers, lakes, reservoirs, ponds and other waters. So the patterns on their backs also protect them from living in their habitats.

Turtle (Chincmys reevesii? ) is one of the turtles. Sometimes specific? Turtles are also called golden turtles, grass turtles, mud turtles and mountain turtles. Taxonomically, it belongs to reptiles, turtles and turtles, and is one of the common turtles. This is an ancient reptile. Its characteristic is that its shell is very strong. When attacked, turtles can retract their heads, tails and limbs into their carapace (except turtles and snapping turtles). Most sea turtles are carnivores, feeding on worms, snails, shrimp and small fish, as well as stems and leaves of plants. Turtles are distributed almost everywhere in China, but the yield in the middle and lower reaches of the Yangtze River is higher. It is also produced in various parts of Guangxi and Shandong, especially in southeastern and southern Guangxi. Foreign countries are mainly distributed in Japan, Brazil and North Korea.