A major pressure on many surviving species of parrots is that people want to own them.
The single surviving species of family Bolyeriidae (Casarea dussumieri) lives on Mauritius and Round Island.
The ginkgo trees, for instance, are the only surviving species of a family originating some 300 million years ago.
There are just two surviving species today, one found on Cuba and the other, more well known, on Hispaniola.
Koalas (Phascolarctos cinereus) are a unique and iconic Australian marsupial, and the last surviving species of the family Phascolarctidae.
This extinction eliminated about half of marine invertebrate genera and left some groups with very few surviving species.
Communities were characterized by their species richness and by the four life-history traits averaged over all the surviving species.
This diversity is obtained by running population dynamics and evaluating the robustness (i.e., the fraction of surviving species).
The gingko tree (Gingko biloba), which goes back to the Jurassic Period, is, he writes, the only known surviving species of the tree fern family.
In fact, the real lesson from the fate of the Earth's megafauna is to appreciate how important surviving species are to our planet.
