Sumatran Species

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Conservation Status of Sumatran Species
Sumatran orangutans. Sumatran orangutans are classified as critically endangered by both the WWF (2017a, para. 1) and on The IUCN Red List of Threatened Species (Singleton, Wich, Nowak & Usher, 2016, p.1). Previously published Red list reports indicate that the Sumatran orangutans have been classified as critically endangered since 2000 (Singleton et al., 2016, p.2). Both the WWF (2017a, para. 1) and Singleton et al. (2016, p. 4) suggest that the population of Sumatran orangutans is 14,613 however, Singleton et al (2016, p.4) advises that only 13,835 are viable due to a small population size of some groups. Singleton et al. (2016, p. 4) identifies the current population
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Sumatran elephants are classified as critically endangered with an estimated population of 2,400-2,800 (Gopala et al., 2001, p.1; WWF, 2017c, para.1). The conservation status of Sumatran elephants was changed in 2012 to critically endangered due the population halving in just one generation (WWF, 2017c, para.4). This population loss is attributed to poaching, unauthorised removal of elephants from the wild, human-wildlife conflict and forest conversion for palm oil, paper and pulp plantation (Gopala et al., 2001, p.4; WWF, 2017c, para.4).
Sumatran rhinos. Both the WWF (2017d, para. 1) and The IUCN Red List of Threatened Species (van Strien et al., 2008, p. 1) categorise Sumatran rhinos as critically endangered. In 1965 the Sumatran rhino was first classified as very rare and suspected to have a decreasing population, then in 1986 was categorised as endangered (van Strien et al., 2008, p. 1). Following this, in 1996 the Sumatran rhino was re-classified as critically endangered due to its continuous and severe population decline (van Strien et al., 2008, p. 1). There are three subspecies of the Sumatran rhino, one with the largest population of approximately 170-230, one within an estimated population of 50 and one which is likely to be extinct (van Strien et al., 2008, p.4). This is in line with the WWF (2017d, para.1) which estimates a total population of 220-275. van Strien et al (2008, p.4) states that the current population trend of Sumatran rhinos is
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