“…The adaptive significance of snake head size, both absolute and relative, has been the focus of numerous publica-Animal Ecology Research Group, Hungarian Academy of Science, Hungarian Natural History Museum, Budapest, Hungary Department of Animal Ecology, Ecology Building, Lund University, S-22362 Lund, Sweden School of Biological Sciences, University of Wollongong, NSW 2522, Australia e-mail: madsen@uow.edu.au tions (e.g. Shine, 1991;Arnold, 1993;Forsman, 1996;Elgee and Blouin-Demers, 2011).…”