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The difference between American frog and bullfrog

The difference between them lies in their skin and appearance.

1. Skin: China Rana chensinensis has smooth skin, few papules, green head, green and brown body during growth, and evenly distributed spots on its back and limbs. Bullfrog's skin is rough and uneven, its head is green and brown, its body color is gray-black, and its whole body is covered with massive spots.

Appearance: Frog's head is slightly pointed, green, with prominent eyes, smooth skin, few protrusions, evenly distributed spots on its back and limbs, and its abdomen is silvery white. The bullfrog's head is wide and flat, and he is exhausted.