Why Are There So Many Unique Animals In Australia. The continent has so many marsupials, it raises the question: If you mean 'crazy' as being unique and existing no where else on the planet, then you are so right with your observations because according to department of foreign affairs and trade.
Among the animal species that can only be found in australia are the monotremes, which are mammals that lay eggs! That is why on the mainland many animals' groups have distinctive signs (marsupial mammals, for example). There are some 250 species of native mammals, 550 species of land.
Due to this isolation and the lack of predators, australia's unique fauna developed.
Every place has distinct animals. Because australia has been isolated from the rest of the world for many thousands of years. For millions of years, the australian continent was so far away from any other landmass that there was no possibility for new types of animals to get to it. Hope this gives you a better understanding!
