https://phys.org/news/2018-06-mountain-gorilla-climb.html

Conducted over 2015 and 2016 by the Protected Areas Authorities in the Democratic Republic of Congo, Rwanda and Uganda, the survey results are an encouraging sign for conservation efforts with the mountain gorilla being the only great ape in the world considered to be increasing in population.

Margaret Kinnaird, Wildlife Practice Leader, WWF, said: