https://phys.org/news/2018-10-nature-assault-key-indicators.html > From 1970 to 2014, the number of animals with a backbone—birds, reptiles, amphibians, mammals and fish—plummeted across the globe, on average, by about 60 percent. > For freshwater vertebrates, losses topped 80 percent. Geographically, South and Central America have been hit hardest, with 89 percent less wildlife in 2014 than in 1970.