5 facts about extinction on World Wildlife Day

Indonesia, China, India and Brazil are the countries with the most threatened species. The California flag features the California grizzly bear. They became extinct in 1924. Natural extinction occurs at a rate of one to five species a year. We are currently losing dozens each day. 20% of the world's wildlife will be extinct within the next 30 years if extinctions continue at the current rate. There are a total of 2,599 species, subspecies, and sub-populations listed as critically endangered.