Currently, forests occupy 20% of the country. Up to 70% of the stand is deciduous species. In the mountains in the north of Thailand and near the border with Myanmar, wet monsoon mixed deciduous forests dominate, with teak, planus xylia, pterocarpus, large-fruited, and other hardwood species. These forests are interspersed with thickets of bamboo.
On the open slopes in northern Thailand, there are oak forests at altitudes of more than 1000 m asl. alternating pine forests of Merkuza and Hazy pines. Wet evergreen broadleaf monsoon forests are common in the valley of the river Mekhlong in the west and in the wettest places in the southeast.
Dry monsoon forests are found on the Korat Plateau, on the Central Plain, and also in the high mountains in the west of Thailand. In these forests are dominated by stunted trees, bamboo and thorny bushes. Evergreen rainforests are widespread in the south and southeast. They are dominated by dipterocarpes (Yang, Takyans), Khopei, Anisoptera, Saltwood, Palms (Areca, Sagovaya), there are bamboo, pandanus. Vines are widespread.
There are mangroves on the seashore, however, introduced tree species, such as eucalyptus and acacia, often crowd out indigenous communities that are heavily affected by logging. The government of Thailand in 1989 sharply limited the extent of logging, but nevertheless the rate of deforestation declined only slightly.
Hunting and loss of natural habitats contributed to a sharp decline in wildlife in Thailand. However, in some remote areas and in protected areas elephants, tigers, leopards (including a very rare clouded leopard), white-chested and Malay bears, gaur and banteng bulls, Asian buffalo, serou, a very rare animal black-headed tapir are still found.
There are numerous monkeys (white-faced gibbons, macaques, orangutans, langurs), muntzhak and zambar deer, small and big deer, antelopes and other mammals. Tamed elephants and buffaloes are widely used in agriculture.
In Thailand, there are several dozen snake species, including venomous ones.
The fauna of birds is extremely diverse: there are many waterfowl (egrets, white pelicans, ducks), pheasant, wild chickens, partridges, parrots, peacocks (including green), birds of prey, etc. are common. The world of insects is diverse, including more than 600 species of butterflies .