# 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 1,395 hectares (3,450 acres) 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.
| Name | Species |
| Bogotá rail | Rallus semiplumbeus |
| bronze-tailed thornbill | Chalcostigma heteropogon |
| rufous-browed conebill | Conirostrum rufum |
| spot-flanked gallinule | Gallinula melanops |
| cerulean warbler | Setophaga cerulea |
| olive-sided flycatcher | Contopus cooperi |
| snowy egret | Egretta thula |
| noble snipe | Gallinago nobilis |
| blue-throated starfrontlet | Coeligena helianthea |
| coppery-bellied puffleg | Eriocnemis cupreoventris |
| subtropical doradito | Pseudocolopteryx acutipennis |
| pale-bellied tapaculo | Scytalopus griseicollis |
| silvery-throated spinetail | Synallaxis subpudica |

#### 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.

##### Bats

| Name | Species |
| big brown bat | Eptesicus fuscus |
| hoary bat | Lasiurus cinereus |
| Mexican free-tailed bat | Tadarida brasiliensis |
| Seba's short-tailed bat | Carollia perspicillata |
| Geoffroy's tailless bat | Anoura geoffroyi |
| Peale's free-tailed bat | Nyctinomops aurispinosus |
| Wagner's bonneted bat | Eumops glaucinus |
| small big-eared brown bat | Histiotus montanus |
| black myotis | Myotis nigricans |
| Bogotá yellow-shouldered bat | Sturnira bogotensis |
| highland yellow-shouldered bat | Sturnira ludovici |

#### 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:
| Name | Species |
| American painted lady | Vanessa virginiensis |
| dimera sulphur | Colias dimera |
| Enyo satyr | Corades enyo |
| Julia butterfly | Dryas iulia |
| | Hemiargus hanno |
| | Altopedaliodes cocytia |
| | Lasiophila circe circe |
| | Panyapedaliodes drymaea |
| | Pedaliodes phaea |
| | Actinote chea |
| | Catasticta semiramis semiramis |
| | Corades medeba |
| | Leptophobia eleone eleone |
| | Manerebia indirena |
| | Pedaliodes fuscata |
| | Pedaliodes ochrotaenia |
| | Pedaliodes phoenissa |
| | Pedaliodes polla |
| | Pedaliodes prytanis |

## Gallery

* Map of the extent in 2016
* La Conejera wetland, part of the reserve