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cmsdata.iucn.org/downloads/species_extinction_05_2007.pdf

THE IUCN RED LIST OF THREATENED SPECIES™ Species Extinction – The Facts believed to survive today. The remainder of geological history, the current extinc human activity is known to Their ranks include familiar species like the Polar Bear, Hippopotamus, sharks, one in eight birds face a environmental security. extinction rate is estimated

www.theworldcounts.com/.../species_extinction_facts

Species gone extinct. It is impossible to know exactly how many species go extinct every year. Estimates of annual extinctions vary from 10,000 to 130,000. We use the upper estimate of the WWF of 100,000 species. WWF: How many species are we losing? Whole Systems Foundation: Species Extinction and Human Population

www.statisticbrain.com/endangered-species-statistics

Animal Species Extinction Statistics Number of Species Number of Animal species that have gone extinct 801 Number of Animals that are extinct in the wild 64 Number of Animals that ...

conservationfolks.com/animal-extinction-statistics-species-we-will-lose

Expanding on the issue, the rapid loss of species we see today is between 1000 to 10,000 times higher than the natural extinction rate, according to experts. They calculate that between 0.01 and 0.1 percent of all species vanish every year, which allows for estimations depending on the total number of species.

www.factretriever.com/extinction-facts

Many scientists believe we are now in a sixth, with dozens of species going extinct every day. [1][8] The current global rate of extinction matches that of the extinction of the dinosaurs 65 million years ago. [8] Extinction occurs at a natural background rate of 1-5 species per year.

someinterestingfacts.net/animal-extinction-facts

Mass-extinction is characterised by a sharp and widespread decrease in the diversity of life, occurring when the rate of extinction increases beyond that of the rate of speciation (the creation of new species). In the past 540 million years, there have been five mass-extinction events, each claiming more than 50 per cent of animal species.

www.nationalgeographic.com/science/prehistoric-world/mass-extinction

The Permian-Triassic extinction event was the deadliest: More than 90 percent of all species perished. Many scientists believe an asteroid or comet triggered the massive die-off, but, again, no ...

news.nationalgeographic.com/news/2014/05/140529-conservation-science-animals...

To calculate the rate of extinction before modern humans evolved, about 200,000 years ago, Pimm and his colleagues reviewed data from fossil records and noted when species disappeared, then used ...

www.biologicaldiversity.org/.../elements_of_biodiversity/extinction_crisis

The IUCN estimates that almost 50 percent of the world's primate species are at risk of extinction. Overall, the IUCN estimates that half the globe's 5,491 known mammals are declining in population and a fifth are clearly at risk of disappearing forever with no less than 1,131 mammals across the globe classified as endangered, threatened, or ...

wwf.panda.org/our_work/biodiversity/biodiversity

But if the upper estimate of species numbers is true - that there are 100 million different species co-existing with us on our planet - then between 10,000 and 100,000 species are becoming extinct each year. *Experts actually call this natural extinction rate the background extinction rate. This simply means the rate of species extinctions that ...