The surilis are a group of Old World monkeys and make up the entirety of the genus Presbytis. They live in the Thai-Malay Peninsula, on Sumatra, Borneo, Java and smaller nearby islands.
The Siamese crocodile is a small to medium-sized freshwater crocodile native to Indonesia, Brunei, East Malaysia, Laos, Cambodia, Myanmar, Thailand and Vietnam. The species is critically endangered and already extirpated from many regions. Its other common names include Siamese freshwater crocodile, Singapore small-grain, and soft-belly.
Daboia siamensis is a venomous viper species that is endemic to parts of Southeast Asia, southern China and Taiwan. It was formerly considered to be a subspecies of Daboia russelii, but was elevated to species status in 2007.
The white-thighed surili is a species of primate in the family Cercopithecidae. It is endemic to the Thai-Malay Peninsula, the Riau Archipelago and Sumatra. Four subspecies, siamensis (nominate), cana, paenulata and rhionis, are recognized here, but the taxonomy is disputed and in need of a review, and it has included P. natunae as a subspecies, or alternatively both have been considered subspecies of P. femoralis.
Shorea siamensis is a species of plant in the Dipterocarpaceae family. The tree is growing in most of Southeast Asia and is found in Myanmar, Malaysia, Thailand, Cambodia, Vietnam and Indonesia.
Mammea siamensis is a species of flowering plant in the Calophyllaceae family. Its name in Vietnamese is Trau tráu.
Platytropius siamensis is a species of schilbid catfish family Schilbeidae. It originated from the Chao Phraya and Bang Pakong Rivers in Thailand. It inhabited lower to middle reaches, mainstreams, tributaries, and larger marshlands. The species has been declared extinct in 2011 by the IUCN Red List of Threatened Species, because despite periodic surveys it has not been encountered since 1975–1977.
Macrognathus siamensis is a tropical fish belonging to the Mastacembelidae family.
The Indochinese spitting cobra also called the Thai spitting cobra, Siamese spitting cobra or black-and-white spitting cobra, is a species of spitting cobra found in Southeast Asia.
Bithynia siamensis is a species of a freshwater snail with a gill and an operculum, an aquatic prosobranch gastropod mollusk in the family Bithyniidae.
The Thai horseshoe bat, sometimes called the Thai leaf-nosed bat, is a species of bat from the family Rhinolophidae. It is frequently listed as a subspecies of the Big-eared horseshoe bat, but this may be a result of the two species being taken in sympatry in Laos. It is native to China, Laos, Thailand, and Vietnam.
Tham Pla–Namtok Pha Suea National Park is a national park in Mae Hong Son Province, Thailand. It is home to caves, waterfalls and steep mountain terrain.
Mesosini is a tribe of longhorn beetles of the Lamiinae subfamily.
The gray cat snake, also known as eyed cat snake or Siamese cat snake is a species of catsnake found in northeastern India, Bangladesh, Myanmar, Cambodia, Thailand, Malaysia, and Vietnam.
Daboia is a genus of venomous vipers.
Khun Khan National Park is a national park in Thailand's Chiang Mai Province. This mountainous park is home to forests, waterfalls and cliff-top viewpoints.
Cycas siamensis is a species of Cycad endemic to Myanmar, Thailand, and Vietnam.
Paragolsinda fruhstorferi is a species of beetle in the family Cerambycidae. It was described by Stephan von Breuning in 1956.
Paragolsinda obscura is a species of beetle in the family Cerambycidae. It was described by Masaki Matsushita in 1933. It is known from Taiwan.
