Colombia harbors a large number of earth's species.
Colombia is the country with the second-highest biodiversity in the world , behind Brazil . The country occupies the first position worldwide in number of orchids and birds , second position in plants , amphibians , butterflies and fresh water fish , third place in species of palm trees and reptiles and globally holds the fourth position in biodiversity of mammals . Colombia . Ecologically , it is one of the world 's 17 megadiverse countries , and the most densely biodiverse of these per square kilometer .