Which amphibian, often called a "spring peeper," is famous for its loud peeping sound in early spring?

The Spring Peeper Frog is well-known for its distinctive and loud peeping call, which is typically heard in the early spring as males vocalize to attract females during the breeding season. This small, tree frog has a characteristic "X" marking on its back and thrives in wetland habitats, making it a common inhabitant of woodlands near ponds and marshes.

The peeping sound of the Spring Peeper is one of the early indicators of spring and signifies the return of warmer weather. This species is particularly noted for its ability to survive cold temperatures, allowing it to be active and vocalize during cool evenings in early spring, which adds to the soundscape of the season. The significance of the Spring Peeper’s call is not just for mating purposes, but it also serves as a harbinger of seasonal change, marking the transition from winter to spring in many regions.