Gorilla NumbersCensuses

Censuses

  • Ranger-based monitoring in the Virungas (© IGCP)

Survey of the Cross River Gorilla at the Tofala Hill Wildlife Sanctuary in Cameroon

July 2017

In January 2014 I started to study the ecology of Cross River gorillas at the Tofala Hill Wildlife Sanctuary (THWS) in collaboration with the local...[details]

Grauer’s Gorilla Population Reduced Dramatically

April 2016

Grauer's gorillas are a subspecies of eastern gorillas and live in eastern Democratic Republic of the Congo - an area where fighting between various...[details]

Using Remote Video Camera Traps for Multi-Species Assessments in Gabon

July 2015

Camera trap (© Josephine Head)

Accurate population assessments of endangered species are of great importance for determining conservation priorities and measuring the success of...[details]

The Status of Grauer's Gorilla in the Usala Forest

July 2015

Nkomo mountain which supports gorillas, taken from Rama village (© Stuart Nixon)

The Usala forest sits at the heart of the 30,000 km² Maiko Tayna region of eastern Democratic Republic of the Congo, and is among the most...[details]

Maiko National Park Progress Report

January 2015

Taking notes at a gorilla nest in the Kahuzi-Biega National Park (© FZS)

Maiko National Park, Democratic Republic of the Congo, lies in one of the most remote forest areas in the world. It is an incredible wilderness area,...[details]

Getting off the "in Danger" List: Kahuzi-Biega

June 2014

The Kahuzi-Biega National Park (KBNP) has been a UNESCO World Heritage Site since 1980. Since 1997, it has been on the list of World Heritage Sites...[details]

Gorillas in the Dimonika Biosphere Reserve

July 2013

Approaching the Dimonika Biosphere Reserve

Designated in 1988 under the UNESCO Man and the Biosphere Program, Dimonika Biosphere Reserve is located in the central Mayombe Mountain chain in the...[details]

Gorilla Guardian Update

January 2013

Takpe chief receiving WCS in the community (© WCS/Takamanda-Mone Landscape Project)

The Cross River gorilla (Gorilla gorilla diehli) is Critically Endangered, with perhaps fewer than 250 individuals remaining within their range,...[details]

DFGF Grauer’s Gorilla Program

January 2013

Biruwe field technicians (© DFGFI)

The Dian Fossey Gorilla Fund In­ter­na­tio­nal (DFGFI) has expanded its efforts in the Democratic Republic of the Congo (DRC) to build a new Grauer’s...[details]

Bwindi Gorilla Number Increased to 400

November 2012

The census team working (© IGCP)

A census of the gorillas in Bwindi Impenetrable National Park conducted in 2011 confirms a minimum population of 400 gorillas, raising the world...[details]

Key Species Monitoring Plan for Kahuzi-Biega

January 2012

Range areas of the gorilla groups (© Radar Birhashirwa Nishuli)

A monitoring plan for gorillas and elephants has just been launched in the highland sector of the Kahuzi-Biega National Park (KBNP). Its pur­pose is...[details]

Gorillas in Deng-Deng

July 2011

Location of the Deng Deng and Mbam et Djerem National Parks in Cameroon and Gorilla gorilla gorilla distribution (© Angela Meder (information: Fiona Maisels)

Deng Deng - Previous Surveys In 1998 an environmental impact survey of a proposed oil pipeline route from Chad to Cameroon was commissioned by the...[details]

Gorilla Census in the Virungas 2010

June 2010

Augustin Basabose with an assistant during the census (© Augustin Basabose)

Recently, I spent 10 days in the field as part of a team counting mountain gorillas during a 2-month census which took place from 1st March to 25th...[details]

Survey in Itombwe 2006

December 2009

Itombwe Massif Conservation Landscape (© Angela Meder, Adapted from a map by WCS)

The Wildlife Conservation Society (WCS) has been undertaking biological inventories in the Itombwe Massif since 1995. This area holds the largest and...[details]

Genetic Diversity: Cross River Gorillas

July 2009

Distribution of the Cross River Gorilla (© Angela Meder, mit Informationen von Rich Bergl)

Conservation research on gorillas has, to date, mainly focused on demographic factors, human impacts, and the influence of disease. Genetic data have...[details]

Bwindi: Genetic Population

July 2009

Map of the Bwindi Impenetrable National Park with the locations of gorilla groups found during the census. Stars denote lone silverbacks whereas circles represent groups. The size of the circle corresponds to group size. Each group and lone silverback is labeled with a unique identifier tag. Groups and silverbacks that were double-counted during the census are shown in bold and connected by a line. (© reprinted with permission from Elsevier)

Accurate population size estimates are an essential part of every effective management plan for conserving endangered species. Censusing rare and...[details]

New Gorilla Population Estimates in Northern Republic of Congo

December 2008

Petunia with her son Asta while visiting Mbeli Bai (© Thomas Breuer)

On 5 August, 2008, at the XXII International Primatological Society Congress in Edinburgh, the Wildlife Conservation Society (WCS) announced the...[details]

The Gorillas of the Ebo Forest, Cameroon

June 2008

The mountains of the Ebo Forest near Locndeng (© Bethan Morgan)

Cameroon is an important country for both gorillas and chimpanzees. To the south of the Sanaga River, western lowland gorillas (Gorilla gorilla...[details]

Equipment for Gorilla Census

March 2008

Local porters carry the survey equipment through the forest (© Pius Nkumba, WCS TMLP)

For their patrols in the Sarambwe Reserve during one year the rangers were provided with food rations. Related News:Additional Support when the...[details]

News from Kahuzi-Biega 2007

June 2007

Available only within the Gorilla Journal PDF file[details]

Inventory of Kahuzi-Biega 2006

December 2007

Available only within the Gorilla Journal PDF file[details]

Gorillas in Maiko South

December 2005

Available only within the Gorilla Journal PDF file.[details]

Update on Nigeria: WCS's Work

June 2005

Available only within the Gorilla Journal PDF file.[details]

Post-Conflict Inventory of Kahuzi-Biega

June 2005

Available only within the Gorilla Journal PDF file.[details]

Virunga Gorilla Census 2003

June 2004

Available only within the Gorilla Journal PDF file.[details]

The Gorillas of the Ebo Forest

June 2004

Available only within the Gorilla Journal PDF file.[details]

Number of Virunga Gorillas Increased

February 2001

Available only within the Gorilla Journal PDF file[details]

News from Kahuzi-Biega: Second Half of 2000

December 2000

Available only within the Gorilla Journal PDF file[details]

Situation in the Babira Bakwame Area, Kahuzi-Biega Park

December 2010

Cassiterite bags ready to be shipped to Bukavu and Goma (© Isidore Kikukama Mupenda, WWF)

The Kasese region contains the Kahuzi-Biega National Park (KBNP), the Maïko National Park and various forests that are not gazetted as protected...[details]

New Gorilla Census in Bwindi 1997

December 1997

Available only within the Gorilla Journal PDF file[details]

The Status of Grauer's Gorilla

June 1998

Available only within the Gorilla Journal PDF file[details]

Situation in Kahuzi-Biega: First half of 2000

June 2000

Available only within the Gorilla Journal PDF file[details]

Good News for the Cross River Gorillas?

June 2002

Available only within the Gorilla Journal PDF file[details]

Census in the Tayna Gorilla Reserve

June 2002

Available only within the Gorilla Journal PDF file.[details]

Gorillas Frequenting the Mongambe Bais

December 2002

Available only within the Gorilla Journal PDF file.[details]

Presence of Great Apes in Bas-Congo

December 2006

Available only within the Gorilla Journal PDF file[details]

New Gorilla Census in Kahuzi-Biega 2010

June 2011

Chimanuka and one of his offspring (© Angela Meder)

A census team led by the Wildlife Conservation Society and the Institut Congolais pour la Conservation de la Nature (ICCN) in Kahuzi-Biega...[details]

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