Which amphibian in Arkansas is noted for its loud spring call resembling "peep"?

The Spring Peeper is well-known for its distinctive call during the spring mating season, often heard in woodlands and wetlands across Arkansas. Its call, which sounds like a high-pitched "peep," serves as a mating call to attract females. This characteristic vocalization is particularly prominent and can create a chorus-like effect in their natural habitats, signaling the arrival of warmer weather and the breeding season.

In contrast, the other amphibians listed have different vocalizations and habits. American Toads, for instance, have a trilled call that is not similar to the peep of the Spring Peeper. Bullfrogs have a deep and resonant bellow, while the Green Tree Frog produces a distinct, squeaky sound that is also very different from the bright peeping of the Spring Peeper. Thus, the Spring Peeper is uniquely identified by its specific sound, making it the correct choice for this question.