The Geographical Distribution of Animals, Volume 2: With a study of the relations of living and extinct faunas as elucidating the past changes of the Earth's surface

"The Geographical Distribution of Animals, Volume 2" by Alfred Russel Wallace is a scientific publication written in the late 19th century. This volume continues the exploration of zoological geography, focusing on various animal forms and their distribution across different regions, particularly examining relations between living and extinct faunas and their implications for understanding the past changes of Earth's surface. The opening of this volume delves into the Neotropical region, which includes South America, Tropical North America, and the Antilles. Wallace introduces the unique zoological features of the region, highlighting its richness and diversity of species, alongside a notable uniformity of animal life across its expansive tropical areas. He categorizes the region's fauna and discusses sub-regions characterized by specific mammalian and avian species, while also noting the geographical and environmental factors that have shaped these distributions over time.