Frog eggs are born in water, fertilized in vitro, hatched into tadpoles and breathed through gills. After the mutation, adults mainly breathe through the lungs and skin. Most frogs reproduce by in vitro fertilization, and fertilized eggs hatch outside the mother's body into tadpoles.

Frogs in the north are commonly known as Daqingguai, formerly known as frog, green chicken, sitting fish and hare, and scientifically known as black-spotted frog. It is a national protected wild animal.

Frogs are oviparous animals. Frogs are slim and good at swimming. The neck is not obvious, and there are no ribs. The ulna and radius of the forelimb healed, the tibia and fibula of the hind limb healed, the claws could not rotate flexibly, but the limbs were muscular.

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Frogs often inhabit rivers, ponds and rice fields, mainly in the grass near the water, and sometimes they can dive into the water. In the evening, I mainly eat insects, but also some snails, snails, shrimps and small fish. Most of the insects they eat are agricultural pests.

This frog has a white belly, a yellow-green head and back, and some dark brown stripes. Some have three white marks on their backs. The reason why frogs are green is a good disguise. It's about the same color as the grass in the grass.

You can protect yourself from the enemy. Frog's head has two round and prominent eyes, a wide and big mouth and a long tongue. The back of the body is green with dark stripes and the abdomen is white.