Why do frogs always croak at night?

1. Frogs don't like living in an environment that is too cold, too hot or too dry. They like cool and humid places. At night, in the dead of night, the temperature is cool, insects move at night, and frogs come out to hunt insects. At this time, male and female frogs will also mate near the water in Chi Pan to breed. Frogs sing just to attract females. Therefore, every summer night, frogs always croak by the pond.

2. Some male frogs have external sound sacs that can expand and vibrate on both sides of their mouths. The vocal sac produces * * * sound, which makes the frog's song magnificent and loud. After the rain, they will hear the cries of male frogs echoing each other, one after another, and form a chorus. Chorus is much superior to solo because it contains more information; Chorus is loud and far away, which can attract more female frogs, so frogs often use chorus.