Sumatra supports a wide range of vegetation types which are home to a rich variety of species, including 17 endemic genera of plants. Unique species include the Sumatran pine which dominates the Sumatran tropical pine forests of the higher mountainsides in the north of the island and rainforest plants such as Rafflesia arnoldii (the world's largest individual flower), and the titan arum (the world's largest unbranched inflorescence). The island is home to 201 mammal species and 580 bird species, such as the Sumatran ground cuckoo. There are 9 endemic mammal species on mainland Sumatra and 14 more endemic to the nearby Mentawai Islands. There are about 300 freshwater fish species in Sumatra. The Sumatran tiger, Sumatran rhinoceros, Sumatran elephant, Sumatran ground cuckoo, and Sumatran orangutan are all critically endangered, indicating the highest level of threat to their survival. In October 2008, the Indonesian government announced a plan to protect Sumatra's remaining forests. The island includes more than 10 national parks, including 3 which are listed as the Tropical Rainforest Heritage of Sumatra World Heritage Site – Gunung Leuser National Park, Kerinci Seblat National Park and Bukit Barisan Selatan National Park. The Berbak National Park is one of three national parks in Indonesia listed as a wetland of international importance under the Ramsar Convention. The people of Sumatra are multi-lingual, multi-diverse and multi-religious. Most of these groups share many similar traditions and the different tongues are closely related. Ethnic Malays dominate most of the eastern coast in the provinces of Riau, Bangka-Belitung, South Sumatra, Riau Islands, northern parts of Lampung and Bengkulu and in the easternmost parts of North Sumatra and Aceh, while people in the southern and central interior speak languages related to Malay, such as Lembak (that speak Col language), Kerinci (that speak Kerinci language) and Minangkabau people (that speak Minangkabau). The highlands of northern Sumatra is inhabited by the Bataknese, the northernmost coast is dominated by the Acehnese, while southernmost coast is dominated by Ethnic Javanese. Chinese and Tamil minorities are present in urban centres.