Living habits of Rana nigromaculata

1, Rana nigromaculata likes to live in groups, and often several or dozens live together. During the breeding season, black-spotted frogs gather in groups in the still water of rice fields and ponds and hug each other to lay eggs. During the day, Rana nigromaculata often hides in weeds and aquatic plants in swamps, ponds, rice fields and other waters, and comes out to hunt at dusk and at night.

2. Generally, it begins to hibernate in June 165438+ 10, and drills into sunny slopes or anti-crack sandy soil not far from water, with a depth of about 10- 17 cm. In the cold region of Northeast China, Rana nigromaculata can burrow into the sand below 120- 170 cm, and emerge in the middle of March the following year.

3. Tadpole stage is omnivorous, and both plant and animal foods can be eaten. After hatching, tadpoles mainly rely on absorbing yolk sac nutrition to maintain their lives, and after 3-4 days, they begin to eat food such as unicellular algae and plankton in water. After tadpoles become young frogs, due to the structural characteristics of frog eyes, adult black-spotted frogs can only prey on active food. Most of the food is arthropod Insecta, such as Coleoptera, Diptera, Orthoptera, Hemiptera, Homoptera, Lepidoptera and so on. And a small amount of snails, shrimps and vertebrates, such as CYPRINIDAE, Misgurnus anguillicaudatus, frog, little skinhead, etc. When hunting, the frog crouches first. When it finds its prey, it will fine-tune its body direction. When it approaches its prey, it will quickly pounce, roll the food into its mouth with its tongue and swallow the whole food into its stomach. When swallowed, the eyes contract, helping to press food into the stomach.