We are Losing Tetrapod Species at a Faster Rate Than We are Rediscovering Them

Lost tetrapod species are those that have not been observed in the wild for over ten years, despite searches to find them.

The number of lost tetrapod species is increasing decade-on-decade. This means that despite many searches, we are losing tetrapod species at a faster rate than we are rediscovering them. In particular, rates of rediscovery for lost amphibian, bird and mammal species have slowed in recent years, while rates of loss for reptile species have increased.