Frog is not a wild frog, but a tiger frog is a 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, the frog has become the name of frog in the south, just like the northeast people call corn popcorn. In fact, there are many kinds of corn.
Distinguishing method:
The body shape is the same as that of the general frog, but the individual is larger. The female frog is 20 cm long, and the male frog 18 cm is the 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. Rough skin with many wart grains on the back; Rana nigromaculata is 70 ~ 80 mm long. The back is yellow-green, dark green, gray-green or slightly gray-brown, with black spots scattered. There are 1 golden or light brown folds on the dorsal side, and there are 4 ~ 6 skin ridges with different lengths between the folds. There are often 1 light ridge lines from the snout to the anus, and the skin is smooth.