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They were shocked to find up to 200 members of the most severely threatened population of Bornean orangutans. The sub-species Pongo pygmaeus pygmaeus has only around 3,000-4,500 animals left in ...
A 2016 study estimates a population of 14,613 Sumatran orangutans in the wild, twice that of previous population estimates, [131] while 2016 estimates suggest 104,700 Bornean orangutans exist in the wild. [119]
The rate of deforestation during this time directly correlates with the decrease in orangutan population, as the species cannot survive in other areas. It is estimated that since 1950, the orangutan population has declined by 60%. [24] Between 1999 and 2015, the population of Bornean orangutans decreased by 100,000 individuals. [2]
This population currently numbers around 70 individuals and is reproducing. [1] However it has been concluded that forest conservation costs twelve times less than reintroducing orangutans into the wild, and conserves more biological diversity. [36] Orangutans have large home ranges and low population densities, which complicates conservation ...
There are three types of orangutans left in the world. The Bornean, the Tapanuli and the Sumatran. It’s believed that there are only 14,000 individual Sumatran orangutans left in the wild.
Population Status Trend Notes Image Hainan black crested gibbon: Nomascus hainanus: 20–50 [1] CR [1] [1] Population was estimated at over 2,000 in the late 1950s. [1] Eastern black crested gibbon: Nomascus nasutus: 45–47 [2] CR [2] [2] Previously thought to be possibly extinct. Numbers may be higher. [2] Cat Ba langur: Trachypithecus ...
The total number of Bornean orangutans is estimated to be less than 20 percent of what it was 50 years ago (from a population of about 288,500 in 1973 [7] to a population of about 57,350 in 2016 [9]) and this sharp decline has occurred mostly over the past few decades due to human activities and development. [10]
An orangutan peeling a banana with its hand and foot. The Bornean orangutan diet is composed of over 400 types of food, including wild figs, durians (Durio zibethinus and D. graveolens), [29] leaves, seeds, bird eggs, flowers, sap, vines, [30] honey, fungi, spider webs, [30] insects, and, to a lesser extent than the Sumatran orangutan, bark.