World Wildlife Day 2021: 8 Critically Endangered Animal Species You Should Know About

World Wildlife Day is celebrated every year on March 3. One key objective is to spread awareness on critically endangered species that need our urgent attention. Here's a look at a list of critically endangered animal species as per the International Union for Conservation of Nature (IUCN) Red List of Threatened Species (also known as the IUCN Red List or Red Data Book).