If you don't know about tortoises, the species of tortoises are not fully recognized, and if you don't pay attention, you will make mistakes between turtles and turtles. Different species of turtles The price difference is also very big, so when we go to the store to buy turtles, it is easy to be fooled by black-hearted shopkeepers. The appearance of the big tortoise is very similar to that of the tortoise, and even the color of the turtle shell is very similar. Let's take a look at the basic shape of the big-headed turtle.

1 piece of cervical shield, small long strip or small inverted bell, 5 pairs of vertebral shields, 4 pairs of costal shields, 11 pairs of beak shields, short plastron On the carapace, the front beak is flat, the back beak is deeply concave, the ventral scutellum or chest shield suture is the longest, the humeral shield is the shortest, and the concentric patterns of each scutellum are clear. The back of the head is olive-colored, and the rest are blue-gray. There are many intermittent stripes of light yellow with black-gray borders on the back of the head along the retro-orbital beak. Some of them are semicircular at the tympanic membrane. Yellow stripes, both sides extending back along the neck. The carapace is chestnut brown or slightly black, with 3 longitudinal edges, and the ridges are obvious and brown-black. The color of the bridge of the nail and the plastron are the same as brown-black or with irregular yellow spots. The radioactive stripes of the plastron are not obvious with the feeling of cloud diffusion, and the limbs and other soft skin parts of the body are gray-black.

The head is large and triangular in shape, and the back of the head is covered with a large horny hard shell. The upper beak is hooked and curved in the shape of an olecranon. Carapace brown, long oval with flat center, front and rear edges not toothed. The plastron is olive-colored, small and flat, and the dorsal and plastron are connected by ligaments and have a lower angular plate. The limbs are gray, with tile-like scales, and the hind limbs are long. Except for the lateral fingers and toes, there are sharp long claws, and there are semi-webbed between the fingers and toes, which is conducive to crawling on land and swimming in water.

The length of the tail, some have exceeded the length of their own carapace, and the tail is covered with short ring scales. The head and limbs of this turtle cannot be retracted into the plastron. It is a special kind of turtles known in China.

Other features:

1. The carapace is spindle-shaped, with obvious ridges and brownish black

2. The head is wide It is 1/3-1/2 of the width of the front edge of the nail, and the head and back are olive.

3. The rostral end and the jaw margin are almost in a vertical downward line, the jaw is broad and the eyes are large

4. On the head, along the posterior orbital rim, there are several intermittent streaks inlaid with black-gray and light yellow.

5. The color of the bridge of the nail and the plastron are consistent with brown-black radioactive streaks, which are not obvious, and some are complete black.