26 October 2010
Last updated at 22:00 ET
More than one-fifth of vertebrate species are under threat, says the International Union for the Conservation of Nature (IUCN). A report out on Tuesday reveals the status of mammals, reptiles, amphibians, fishes and birds like this Asian crested ibis.
The report shows that many conservation efforts are having positive effects. For example, the Przewalski's horse (Equus ferus) was once extinct in the wild but thanks to conservation efforts has been returned to its natural habitat in Mongolia.
The black-footed ferret (Mustela nigripes) was once extinct in the US but, like the California condor, populations raised in captivity have been returned to the wild.
The process of reintroduction to the wild is ongoing for the Kihansi spray toad (Nectophrynoides asperginis). Its global range covers less than two hectares in eastern Tanzania.
Perhaps one of most prominent conservation successes has been the humpback whale (Megaptera novaeangliae), a species moved from the "vulnerable" to the "least concern" category on the IUCN list, thanks to international laws banning commercial whaling.
The Convention on International Trade in Endangered Species (CITES) has seen the successful recovery of populations of the Vicuna (Vicugna vicugna) in South America. Nevertheless, the report shows, more than 50 species move closer to extinction each year.