Why

Why are the Estern Lowland Gorillas endangered?
Threats to gorilla survival include habitat destruction and the bushmeat trade. In 2004 a population of several hundred gorillas in the Odzala National Park, Republic of Congo was essentially wiped out by the Ebola virus.

Habitat Destruction
Habitat destruction is the process in which natural habitat is rendered functionally unable to support the species originally present. In this process, plants and animals which previously used the site are displaced or destroyed, reducing biodiversity. Agriculture is the principal cause of habitat destruction. This photo was taken last year on the approaches to the National Park. This was once the habitat of the Eastern Gorilla. (photos from Filckr - CC http://www.flickr.com/photos/youngrobv/)