IUCN Red List

Many rhino species are endangered - there are less than 50 Javan rhinos alive today, and the Black Rhino is listed as "critically endangered" on the IUCN Red List.

WATCH: 'Miracle' Baby Rhino Birth The Huffington Post 2010

Many rhino species are endangered - there are less than 50 Javan rhinos alive today, and the Black Rhino is listed as "critically endangered" on the IUCN Red List.

WATCH: 'Miracle' Baby Rhino Birth The Huffington Post 2010

According to the IUCN Red List, the Magellanic penguin is classified Near Vulnerable, with a population stated to be declining.

Magellanic penguin 2010

According to the IUCN Red List, China is a tenuous home to 385 threatened species.

Jeff Schweitzer: China's Downfall: the Ultimate Impact of Environmental Degradation 2009

This system is designed to determine the relative risk of extinction, and the main purpose of the IUCN Red List is to catalogue and highlight those plants and animals that are facing a higher risk of global extinction (i.e. those listed as Critically Endangered, Endangered and Vulnerable).

IUCN Red List Criteria for Endangered 2009

The IUCN Red List estimates that 12-52% of species within well-studied higher taxa such as vertebrates and vascular plants are threatened with extinction.

Biodiversity 2009

For example, the IUCN Red List reports that some 275 species of freshwater crustacea and 420 freshwater mollusks are globally threatened, although no comprehensive global assessment has been made of all the species in these groups.

Ecosystems and Human Well-being~ Wetlands and Water~ Wetlands and Water~ Ecosystems and Human Well-being 2008

The IUCN Red List categorizes both species as endangered.

Red Sea Nubo-Sindian tropical desert and semi-desert 2008

Between 12% and 52% of species within well-studied higher taxa are threatened with extinction, according to the IUCN Red List.

Ecosystems and Human Well-being~ Biodiversity Synthesis~ Key Questions on Biodiversity in the Millennium Ecosystem Assessment 2008

The red-shouldered vanga and long-tailed ground roller are recorded as "Vulnerable" species on the recent IUCN Red List of Threatened species.

Madagascar spiny thickets 2008