A species is considered endangered if it meets one of the following criteria: a 50–70% population decrease over 10 years, a total geographic area less than 5,000 km2 (or local population area less than 500 km2), a population size less than 2,500 adults, a restricted population of 250 adults, or a statistical prediction that it will go extinct within the next 20 years.
Many commonly known animals are now considered endangered, including the tiger, blue whale and Asian elephant.
Can you imagine a world without these animals? We certainly can’t. Let’s make sure this doesn’t happen!