This story raises some troubling predictions, I know the particular methodologies that lead to the figures in the title and article have been called into question, however it's based off a trajectory of current wildlife decline since 1970.. Even if there is some imprecision in the predictions, it is still pretty sad that this is happening to the extent it is and some are calling it the next mass extinction event. To go along with these events, I believe there is also a push to say that we are moving to a new "Anthropocene" geological era.
The animals being lost are diverse, coming from all kinds of environments. For example, the number of elephants has dropped by about 20 percent in a decade, and a third of sharks and rays face extinction because of overfishing. But rivers, lakes, and wetlands have been the hardest hit habitats, suffering an 81 percent decrease in their species population since 1970. Marine life hasn't had it as rough as freshwater species, and only experienced a 36 percent decline. Land populations declined by 38 percent.