Thomas van der Hammen Natural Reserve
The Thomas van der Hammen Natural Reserve or Thomas van der Hammen Forest Reserve is an area of the Bogotá savanna that is under environmental protection. The natural reserve was declared as such in year 2000 by the Ministry of Environment and Sustainable development. It takes its name from the Dutch-Colombian geologist Thomas van der Hammen who devoted his life to the research of the region. The surface area of the protected reserve is approximately and it is located in the north of Bogotá. The protection area has the purpose of creating an  urban forest that connects the Bogotá River and the Eastern Hills of Bogotá, to preserve the underground water sources, improve the quality of the air and protect the diversity and activities of the animal species that exist there. Mayor of Bogotá Enrique Peñalosa has proposed construction in the Reserve that could host 1.5 million people. Flora and fauna. The Thomas van der Hammen Natural Reserve is a rich natural area important for the biodiversity of the Bogotá savanna. Several endemic species have been registered, and two newly described species of butterflies were discovered in the Reserve. Fauna. Birds. In the  area of the reserve 187 species of birds have been registered, some of which are endangered. Two species, registered in the past; "Cistothorus apolinari" and "Polystictus pectoralis" have not been reported recently. Mammals. Registered mammals are among others guinea pigs, Andean white-eared opossum ("Didelphis pernigra"), tigrillo ("Leopardus tigrinus"), long-tailed weasel ("Mustela frenata"), and eleven species of bats. Butterflies. With 350 endemic species, Colombia occupies the first position worldwide in diversity of butterflies and after Peru, the second place in total number of registered butterfly species (3274). The Thomas van der Hammen Natural Reserve contains 23 (new studies report  more than 26 with two new species in the genus "Satyrinae" discovered) species of butterflies. Other species of butterflies have been registered: