Frogs don't like living in an environment that is too cold, too hot or too dry. They like cool and humid places, so they are really happy when it rains. Especially after a sunny and dry day, when it is about to rain, because the air pressure drops, the humidity increases and the water in the air increases, the frog's skin is fully moist, so it becomes active.
At the same time, in the rainy season, many insects breed at this time. These insects are the best food for frogs. At this time, the frog has just passed the cold and dry winter and needs a lot of insects to recover its strength. With good food and a good environment, frogs can't help singing loudly; Taking this opportunity, male and female frogs also mate and breed near the water in Chi Pan.
Summer nights are very hot. There were waves of frogs' cries in the field: "Quack, quack, quack". This kind of animal chorus often comes and goes, echoing in the night sky all night.
Frogs are amphibians, that is, they can live in water or on land. However, tadpoles that haven't become frogs can't live without water, because they breathe through their gills like fish. After tadpoles grow into frogs, they gradually get used to breathing with their lungs, so that they can live on land.
Although frogs are amphibians, they seem to prefer living in water. We can often see frogs at the water's edge "plop, plop" jumping into the water for a while, and then onto the shore or lotus leaf. At least, frogs like wet environment very much. Therefore, whenever it rains, the humidity in the air becomes higher and higher. At this time, the frogs in the field will cry "happily". When the rain falls, the frogs in the pond jump up and down happily and are busy.
bullfrog
Frogs are a huge family, with different origins and species and different sizes. Some are very big, such as bullfrog, which is a very big frog.
Bullfrogs are also called "noisy frogs" and "edible frogs". It is the "giant" among frogs, each weighing cm. This frog is mainly distributed in Central America and the West Indies and can be eaten. Bullfrog meat has high nutritional value, delicious taste and unique stomach-invigorating function. This amphibian has a high reproduction rate, and each pair of bullfrogs lays about 90,000 eggs. It can be called an "expert" in the frog elephant family.
The breeding of bullfrogs is very interesting. During the breeding period, the male frog climbs on the back of the female frog, hugs the female frog's body tightly with his forelimbs, and stays with the female frog until she lays eggs. The long mating time is really rare in the animal kingdom. But this only completes the task of ejaculation. As a father's duty, he must protect the eggs from hatching completely. In terms of protecting women, male bullfrogs can be regarded as sleepless and inseparable. It was not until the frog eggs hatched into tadpoles that it reluctantly left.
The tadpoles of bullfrog larvae have strong regeneration ability. If a hind leg is broken, it will grow a new leg in a short time. But after reaching adulthood, this special regenerative ability is lost. If you break your leg at this time, you will have to become an unfortunate lifelong disability.
The bullfrog is short and wide, with a sharp top and a wide bottom. I am afraid of sunshine, lonely, and like to have a night outing. During the day, it hides in a damp and cool pond and sleeps quietly. At night, in the dead of night, it will move around looking for prey. Some are crawling on the river bank, others are swimming in the water. The food they eat in different periods is different; In the tadpole stage, just after hatching, the bait is colloid wrapped outside the egg; After that, eat cyanobacteria; After a week, eat aquatic plants and zooplankton; For two weeks, I especially liked eating dead fish and things like that. It takes three months for young frogs to become tadpoles. Young frogs eat beetles, water, insects, small fish and shrimp. Adult frogs have a wider range of foods.
Bullfrogs are good at singing. The cry of the male bullfrog is similar to that of the bull. Its sound can spread to 2 ~ 3 kilometers away.
Bullfrogs also have a strange habit, that is, they like to jump. The bullfrog can jump up to one meter and is really a "high jumper" in the frog family.
The body color of bullfrog is very different between male and female. The back of female frogs is mostly brown with black spots; The ventral surface is white; The eardrum is three-quarters of the eye. The back of male frog is dark green with light black spots; The abdomen color is the same as that of the female frog; The eardrum is one third of the eye; The hind limbs are very long and webbed between the toes.
Bullfrogs are especially vigilant. When they make a slight noise, they quickly jump into the water to take refuge. But the bullfrog has a poor memory. It was just chased by the enemy and forgot all about the "enemy" in the blink of an eye. So they are often caught in the same place. The bullfrog was in a daze when he saw the light. People take advantage of the bullfrog's weakness and shine a flashlight on its eyes. It stays where it is and reaches for it.