 Over 465 species of birds, and 100 species of mammals can be found in these mountains, making it one of the most biodiverse mountain ranges in the Caribbean.The Northern Range runs from the Chaguaramas Peninsula in the west to Toco in the east and consists mainly of steeply dipping metasedimentary rocks and lush rainforest containing a wide variety of plants and animal species.Port of Spain lies at the western end and the city climbs into the hills and valleys which are settled and largely deforested.