eastern Pahang. The geology of the area is predominantly granite, which forms sandy, porous soil and easily eroded. Climate Fraser's Hill's climate is classified as tropical. Rainfall is significant in this area throughout the year. The climate is Af according to the Köppen-Geiger climate classification system. The temperature here averages . The average yearly rainfall is . Precipitation is the lowest in July, with an average of . The most precipitation falls in November—an average of . With an average temperature of , May is the hottest month of the year. January has the lowest average temperature of the year—. Between the driest and wettest months, the difference in precipitation is . Biodiversity Fraser's Hill is located in one of Malaysia's few pristine forests. The high level of biodiversity, first recognised by botanist H. N. Ridley in 1897, has become an area of great interest to scientists and researchers. Over 10% of all plant species discovered in Peninsular Malaysia are located in Fraser's Hill, which is home to 952 indigenous species and 36 endemic species. Thirteen of these were considered extinct and had not been found again for more than 60 years. It is also one of the three available places in the world where the rare Trig Oak (Trigonobalanops verticillata) was discovered. The most dominant group of animals found on Fraser's Hill are invertebrates including: ants, bees, beetles, cicadas, grasshoppers, moths, spiders and termites. They play an important role in sustaining a healthy ecosystem in the region. According to the IUCN Red List, as of 2013, three mammals are listed as endangered: the Malayan tapir (Tapirus indicus), the siamang (Symphalangus syndactylus) and the Malayan tiger (Panthera tigris jacksoni), while two mammals were listed as vulnerable—the serow (Capricornis sumatraensis) and the Malayan sun bear (Helarctos malayanus). Fraser's Hill hosts 250 migratory and residential bird species. Some migrate from the harsh winter in Russia, China and Japan to Fraser's Hill. Others rest at Fraser's Hill for a few months before flying south to Australia and New Zealand for their warmer climate. Birdlife International has designated this area as an important bird area because of its large number of species. Environmental issues The construction of a second golf course near the Jeriau Waterfall involved deforestation, which saw some rare species from its steep slopes. This issue raised concerns among botanists as further development in the area will greatly impact the environment, including