#4 China
Not only is China home to the largest population of human beings on the planet, but it is also one of the most geographically diverse places on the planet. Within these many different regions exist thousands of different types of birds, mammals, plants, reptiles, and fish who also call this country home. From the tropical rainforests that can be found in the Yunnan region to the seemingly endless Gobi desert, there can be no doubt that China deserves a well-deserved place on this list.
#3 Indonesia

Indonesia is an archipelago of more than 10,000 different islands, and as a result, much of the world's land and marine life can be found in this beautiful country. Although Australia gets to take home the mantle of having the most diverse species of fish, Indonesia makes a close second. It also has 1615 different bird species and is actually the only place on the planet where you can see amazing animals like rhinos, orangutans, elephants, bears, and tigers all living in the same forest.
#2 Colombia
Coming in second on the list of most biodiverse countries on Earth is Colombia. With 1812 different avian species, bird watchers will be thrilled to find that Colombia boasts more species of birds than anywhere else. Home to some of the most diverse and magnificent ecosystems in the world, Colombia has within its borders the Amazon and Choco tropical rain forests. Additionally, there are the Sierra Nevada and Andes mountains, along with the grasslands of Ilanos and paramos, and finally the islands of the Pacific and San Martin in the Caribbean.
#1 Brazil
Maybe you guessed it, and maybe you didn't; either way Brazil is still the most biodiverse place on the planet, which should come as no surprise when you consider both how large the country is and the incredible ecosystems that thrive in its borders. We would be remiss not to mention its two largest rainforests, the Amazon and the Mata Atlantica, which contain nearly 20% of all plant life on mother Earth! Additionally, Brazil is in second place in the amount of mammals and amphibians, and third in all birds, reptiles, and fish.