Experts are calling it the Sixth Extinction.
For example, according to the background extinction rate, no more than one species of amphibian would be expected to go extinct in a typical century. Today, 2,341 are at risk. Similarly, no more than one species each of mammal, reptile or bird would go extinct naturally every 100 years, but the species at risk today number in the thousands.
Within these animal classes, there are smaller groups of related species that are particularly at risk. This is because certain orders, families, and genuses share particular evolutionary traits that appear to have become disadvantages in a world ruled by humans.
To help expose these clusters of related species in danger, we ordered species in the graphic according to their taxonomy: first by order, then by family, then genus.
For instance, overall about a fifth of reptiles are at risk of extinction. This number is already significant, but the data for turtles is even more devastating: 81 percent of species in trouble. Scroll to the reptiles section and click "turtles" in the text.