Fill in the Blanks endangered speciesOnline version There are a lot of animals that are in danger on extinction, read the article and find how we can help stop and protect the animals. by Leyla Lee 1 endangered living agreeing conservation assessing extinct overall conservation conservation Biodiversity Threatened estimated increase statistics create breeding population Internationally species Recovery The status of a is an indicator of the likelihood of that species becoming . Many factors are taken into account when the status of a species , including such as the number remaining , the or decrease in the over time , success rates , known threats , and so on . [ 2 ] The IUCN Red List of Species is the best - known worldwide status listing and ranking system . [ 3 ] It has been that over 40% of all species on Earth are at risk of going extinct . [ 4 ] , 199 countries have signed an accord to Action Plans to protect endangered and other threatened species . In the United States this plan is usually called a species Plan .