Frog is not a wild frog, but a frog with tiger stripes is the real frog. Because it is difficult to observe the frog with black spot (frog) and the frog with tiger stripes without careful distinction, and they are somewhat similar, frog has become the name of frog in the south, just like corn is called corn in the northeast. In fact, there are many kinds of corn.

Distinguishing method:

The body shape is the same as that of ordinary frogs, but the individual is larger. The female frog is 20 cm long, and the male frog 18 cm is bullfrog.

The difference between Rana nigromaculata and Rana tigris is difficult: Rana tigris has a body length of more than 100 mm, a yellowish green brown back with irregular markings; The ventral surface is white; There are transverse spots on the front and rear limbs. The skin is rough and there are many warts on the back. Rana nigromaculata is 70 ~ 80mm long. Its back is yellow-green, dark green, grayish green or slightly grayish brown, with scattered dark spots. There are 1 golden or light brown folds on its back, and there are 4 ~ 6 intermittent skin ridges between folds. There are often 1 light ridge lines from the snout to the anus, and the skin is smooth.