Sergio Ticul Alvarez Castaneda Ph.D. is a Professor at Centro de Investigaciones Biológicas del Noroeste in México, Investigador titular “E” (full professor) and level III in the Sistema Nacional de Investigadores (top level both). He is a Research Associated at the San Diego Museum of Natural History and The Museum of Southwestern Biology of the University of New Mexico. He founded and acts as Editor-in-Chief of the international journal "Therya", member of Editorial boards of other three specialized mammals journals. Dr. Alvarez Castañeda is also the founder and curator of one of the ten top mammal collections in Latin America with representative specimens from North America. His interests are molecular ecology, evolutionary biology, systematics and conservation of mammals. Has published 9 books, more than 150 articles, 44 book chapters, 292 IUCN and 79 CONABIO accounts, more than 120 popular articles and 25 graduated students. His work is based on studies on endemic andendangered species from North America, mainly from México. He received the National Mexican Award “Mérito Ecológico”.