Frog croaking is a vocalization made by male frogs, primarily during the breeding season. This sound serves to attract females and establish territory. Each species of frog has a unique croak, which can vary in pitch, duration, and rhythm. The croaking is produced by forcing air through the vocal sacs, which amplify the sound. The croaking is often heard in wetlands, ponds, and marshes, especially at night. Frogs are most active during warm, humid conditions, making these environments ideal for their calls. The croaking can also indicate the health of an ecosystem, as frogs are sensitive to environmental changes.