This book presents the results and discussion of archaeofaunal studies which took place in the northern San Matías Gulf (Rio Negro Province) during the last six years, focussing on terrestrial mammals and birds. The general objective of this research is to determine what was the mode of operation of terrestrial vertebrates (small and big), and the importance that they had in the survival of human populations that occupied the coastline during the late Holocene (last 3000 years).