- Building on research in which they showed that two species have gone extinct per year over the past century, a team of biologists analyzed the population trends for 27,600 vertebrates around the world.
- They found that nearly a third of the animals they looked at were on the decline.
- In a closer look at 177 well-studied mammals, the team found that all had lost 30 percent or more of their home ranges, and 40 percent had lost at least 80 percent of their habitat
This is the paper by Ceballos and Ehrlich
Biological extinction via the ongoing sixth mass extinction signalled by vertebrate population losses and decline
Here is a conversation between Guy McPherson and Paul Ehrlich, from 2016