The short answer is this: Male frogs croak after it rains because they're trying to attract a mate. Rain creates the optimal conditions for the females to lay eggs in fresh pools of water. In addition to this, frogs like moist, humid weather. ... By the way, frogs also croak during the rain and sometimes before it rains.

What does it mean when a frog croaks?

They croak to attract female frogs for breeding, and to warn away other male frogs from their territory. Female frogs think croaking is very sexy. ... This amplifies the sounds made by the frog's vocal chords, kind of like how the stretched membrane of a drum works.

Why do frogs vocalize?

Frogs and toads produce a rich variety of sounds, calls, and songs during their courtship and mating rituals. ... Acoustic communication is essential for the frog's survival in both territorial defense and in localization and attraction of mates.