Mountain Gorilla
CR
Critically
Endangered

Mountain Gorilla

Gorilla beringei beringei
CR
PRIMATE
AFRICA
FOREST
DISEASE
70/100
PRESSURE SCORE
3RI Delta Index · Maxwell et al. 2016
Decreasing
POPULATION TREND
IUCN Red List, 2019
+322%
HUMAN POP GROWTH IN RANGE
UN World Population Prospects · 1975-2023
402.2M ha
FOREST LOSS IN RANGE
Global Forest Watch GLAD · 2001-2023

The DNA of gorillas is highly similar to that of humans, from 96 to 99% depending on what is included, and they are the next closest living relatives to humans after the bonobos and chimpanzees.

Gorillas are large, primarily herbivorous, great apes that live in the tropical forests of equatorial Africa. The genus Gorilla is divided into two species: the eastern gorilla and the western gorilla, and either four or five subspecies. The DNA of gorillas is highly similar to that of humans, from 96 to 99% depending on what is included, and they are the next closest living relatives to humans after the bonobos and chimpanzees.

3RI Delta Study 1975-2026 · #0165 / 5,001

Threats & Drivers

Primary Drivers

Hunting / Overfishing
8/8
Climate Change
7/8
Habitat Loss
6/8
Human-Caused Disease
6/8
Invasive Species
6/8
Human Conflict / Encroachment
0/8
Source: IUCN Red List threat assessment, 2019

Key Threats

Shifting agricultureRapid Declines

Unspecified speciesRapid Declines

Scale Unknown/UnrecordedRapid Declines

Mining & quarryingSlow, Significant Declines

Unintentional effects: (subsistence/small scale) [harvest]Slow, Significant Declines

Habitat shifting & alterationSlow, Significant Declines

Roads & railroadsSlow, Significant Declines

Unintentional effects (species is not the target)Very Rapid Declines

IUCN Red List Threat Classification v3.2
3RI Delta Study 1975-2026 · #0165 / 5,001

Disease Pathway

DISEASE ALERT

Ebola virus / human metapneumovirus

Pathway: Reverse Zoonosis — Our Diseases → Them

Bushmeat hunters + ecotourists transmit respiratory viruses to habituated gorillas

Emerged: 2003 (Ebola outbreaks killed ~5,000 gorillas in Congo/Gabon)

Severity: catastrophic

Source: IUCN Red List threat data + peer-reviewed literature

Disease Breakdown

Viral Prion: PRESENT

Invasive Species: PRESENT

Unknown Pathogen: ABSENT

Disease threats detected: 2

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Habitat & Range

Habitats

Forest - Subtropical/Tropical Moist Lowland — Major importance

Forest - Subtropical/Tropical Swamp — Minor importance

Forest - Subtropical/Tropical Moist Montane — Major importance

IUCN Habitat Classification v3.1

Range Countries

DR Congo (CD)

Rwanda (RW)

Uganda (UG)

IUCN Red List + GBIF occurrence data

Coordinates

-1.1291, 29.6777

GBIF centroid estimate

Climate Change in Range

Temperature 1981: 16.1 C

Temperature 2023: 18.1 C

Change: +2.02 C

NASA POWER API · 1981-2023
3RI Delta Study 1975-2026 · #0165 / 5,001

Conservation Actions

Actions In Place

Sub-national level

Awareness & communications

Training

National level

Private sector standards & codes

Site/area protection

Site/area management

Resource & habitat protection

National level

Substitution

IUCN Red List Conservation Actions Classification v2.0

Pressure Breakdown

Human Population in Range (1975): 35.0M

Human Population in Range (2023): 148.0M

Growth: +322%

Forest Loss: 402.2M hectares

Severity: critical

Overall Pressure: 70/100 (extreme)

UN World Population Prospects · Global Forest Watch GLAD · 3RI Delta Model (Maxwell et al. 2016)
3RI Delta Study 1975-2026 · #0165 / 5,001

Sources & Methodology

Data Sources

IUCN Red List — Species assessment, threats, habitats, conservation actions

IUCN 2019. Gorilla beringei. Assessment ID: 115576640

Wikipedia — Species summary text

https://en.wikipedia.org/wiki/Gorilla

UN World Population Prospects — Human population data, 1975-2023

Countries sampled: 5

Global Forest Watch GLAD — Tree cover loss, 2001-2023

Countries checked: 5

NASA POWER API — Temperature data, 1981-2023

Methodology

The Triple Pressure Score (0-100) combines three factors: human population growth in species range (30 points), deforestation severity (40 points), climate change impact (20 points), and IUCN trend/status (10 points).

Methodology: Maxwell et al. 2016 · Hogue & Breon 2022 · IPBES 2019

IUCN Red List URL:

https://www.iucnredlist.org/species/39994/115576640

3RI Delta Study 1975-2026 · #0165 / 5,001
v5.0-final