The geography of the area is such that different ecological tiers have been formed, favoring the existence of a great diversity of both flora and fauna.  For example, there are more than 100 species of birds, including the Condor and the Giant Humming Bird;  300 plant species, 30 of which are cacti, and others are very primitive life forms, such as the Yareta; and the four species of Andean camelids are found here: the wild Vicuña and Guanaco, as well as their domesticated cousins, the Llama and Alpaca.