Taiwan has fantastic natural diversity in terms of topography, climate and soils. Of the world’s 12 major soil types, 11 can be found in Taiwan. Consequently there’s a wide range of habitats and these in turn nurture an astonishing variety of animals, birds, insects and plants. Rates of endemism are exceptionally high throughout the biosphere. A quarter of the country’s 5,300 vascular plants are found nowhere else on Earth, and a majority of the 86 terrestrial mammal species are endemic. Of the 300-plus non-marine mollusks, 70% are unique to the island. Scientists are continuing to make discoveries. One of Taiwan’s 14 endemic snakes is Pareas atayal, identified in 2006 and notable for having an asymmetric jaw (20 teeth on one side, 11 on the other) to better extract snails from their shells. In early 2025, Nidirana shyhhuangi was recognised as an endemic frog species with a population of perhaps 700 adults at a single location in Nantou County. At the same time, the country has serious problems with invasive species such as the banded bullfrog (Kaloula pulchra), the green iguana (Iguana iguana) and the African sacred ibis (Threskiornis aethiopicus).

FAUNA Mammals The easiest animal to spot is Taiwan’s only primate, the Formosan macaque (Macaca cyclopis). Also known as the Formosan rock monkey, this endemic is distributed island-wide from sea level to at least 3,000m above sea level, but is most often spotted in foothills in the south and east. Macaques, who live in family groups usually numbering 20 to 40, have light brown fur often speckled with grey. Those hiking in Taiwan’s mid-elevation mountains may encounter the endemic Taiwan serow (Capricornis swinhoei; pictured here), the only native bovid, or the Reeves’s muntjac (Muntiacus reevesi), a type of ‘barking deer’ no bigger than most dogs. Deeper in the interior there are larger animals such as Formosan sambars (Rusa unicolor swinhoei), a kind of deer, and Formosan black bears (Ursus thibetanus formosanus). The latter have distinctive V-shaped white marks on their chests and don’t hibernate. Even though they’ve been known to steal food from hikers’ packs while the humans are sleeping, they tend to keep a very low profile. Researchers fear this endemic subspecies will suffer the same fate as the Formosan clouded leopard (Neofelis nebulosa brachyura), a metre-long cat which hasn’t been sighted since the late 1980s. Once hunted for its skin, it’s now believed to be extinct.
Birds Thanks to its position on the East Asian–Australasian Flyway, Taiwan has fabulously varied birdlife. Some 54 internationally recognised Important Bird Areas (IBAs) cover more than one-sixth of its land area. According to the most recent checklist issued by the Taiwan Wild Bird Federation (w www.bird.org.tw), 678 avian species, including vagrants and migrants, have been recorded in Taiwan and its minor islands. Among them, 30 are endemic species, while a further 54 are endemic subspecies. Many visiting birders have been able to add a dozen or more endemics, including the Taiwan partridge (Arborophila crudigularis) and the mikado pheasant (Syrmaticus mikado), to their ‘life lists’ during ten-day tours. Throughout the western lowlands, visitors will notice white-headed birds in parks and larger white birds near rice fields and rivers. The latter are egrets. There has been some hybridisation between the former, light-vented bulbuls (Pycnonotus sinensis formosae), and an endemic variant, the black-capped Styan’s bulbul (Pycnonotus taivanus). The Eurasian tree sparrow (Passer montanus) is ubiquitous, and in foothills the crested serpent eagle (Spilornis cheela hoya) is an important predator.
FLORA Many of Taiwan’s most common wild flowers are invasive species. Among them are lantana of various colours, especially white, yellow and orange, the daisy-like cobbler’s pegs (Bidens pilosa) and the flossflower (Ageratum houstonianum). The former, an aggressive weed, is used by some Taiwanese as a folk treatment for diabetes. The last has delicate pink blooms. Mimosa pudica is also widespread; this species isn’t very interesting to look at but it does have touch-sensitive leaves that curl up when brushed.







