"The Systematics of the Frogs of the Hyla Rubra Group in Middle America" by Juan R. León is a scientific publication written in the late 20th century. This work delves into the taxonomy, distribution, and natural history of the tree frogs belonging to the Hyla rubra group, primarily found across Middle America and extending to parts of South America. The publication aims to synthesize previous research while contributing new findings about species variations, ecology, and their evolutionary history. The opening of the text provides essential background on the Hyla rubra group, discussing its presence from lowland México to Argentina, with the highest diversity located in southeastern Brazil. León outlines the historical context of the group, citing various researchers who have contributed to its classification over the years. He highlights the importance of the study by noting the lack of published data regarding the ecology and life history of these frogs, thereby establishing the aim of his report: to detail the species within the group as they appear in Middle America, including key physical descriptions, behavioral data, and anatomical analyses that underlie their systematic classification.