Citizen science reveals broad-scale variation of calling activity of the Mediterranean tree frog (Hyla meridionalis) in its westernmost range. - Paracuellos, Mariano; Rodríguez-Caballero, Emilio; Villanueva, Enrique; Santa, Mauricio; Alcalde, Fernando; Dionisio, Miguel Á.; Fernández Cardenete, Juan R.; García, M. Pilar; Hernández, Julio; Tapia, Manuel; Yubero, Saúl; Cuines, Arturo; et al. (Amphibia-Reptilia, 2022)