Bali Island is situated on the border of the Wallace Line, where transition from the Asian wildlife and flora is made into the Pacific Islands biotope. Bali is virtually the southernmost island with specific Asian fauna and flora and with very few influences from the Pacific Islands like the Yellow-crested Cockatoo and other bird species occur. Bali has around 280 species of birds, including the critically endangered Bali Starling, one of the rarest birds in the world. Others are: Barn Swallow, Black-naped Oriole, Black Racket-tailed Treepie, Crested Serpent-eagle, Crested Treeswift, Dollarbird, Java Sparrow, Lesser Adjutant, Long-tailed Shrike, Milky Stork, Pacific Swallow, Red-rumped Swallow, Sacred Kingfisher, Sea Eagle, Woodswallow, Savanna Nightjar, Stork-billed Kingfisher, Yellow-vented Bulbul, White Heron, Great Egret.
Until the beginning of the 20th century, Bali was home to some large animals such as the wild Banteng, Leopard and even the Bali tiger. The first still occurs in its domestic form, while leopards only in neighboring Java, but the Bali Tiger has completely disappeared, with last recorded one in 1937, when last known specimen was shot. Due to the relative small size of the island and clashes with humans, along with poaching and habitat reduction has driven this unique feline to extinction. It was the smallest and rarest of all tiger species and never caught on film or displayed in zoos, few skins and bones remain in museums around the world as a testimony of its undisputed existence. Today, the largest animals remain the Javan Rusa deer and the Wild Boar. The water monitor can grow to an impressive size and move surprisingly quickly. Two species of deer occur in the island the smaller Muntjak and the larger Javan Rusa deer.
Snakes are represented by green snakes and occasional king and pythons occurring around areas where mice and rats are present. Squirrels are quite commonly encountered, more rare the Asian Palm Civet grown also in coffee farms to produce the expensive and controversial Kopi Luwak. Chiropteras are well represented, perhaps the most famous place to encounter them remains the Goa Lawah (Temple of the Bats) where they are worshipped by the locals and also constitute a tourist attraction, and other cave temples like Gangga Beach ones. Two species of primates occur in the island: the Crab-eating Macaque, known locally as “kera” quite common around human settlements or temples, where they became accustomed to people feeding them, particularly in any of the three so called “monkey forest” temples, with the most popular one in Ubud area. They are also quite often being kept as pets by locals. The second primate, far more rare and elusive is the Silver Leaf Monkey known locally as “lutung”. They occur virtually only in Bali Barat National Park, though in decent numbers. Other, rarer mammals include the Leopard Cat, Sunda Pangolin and Black Giant Squirrel.
The rich coral reef around the coast Bali particularly around popular diving spots like Tulamben, Amed, Menjangan or neighboring Nusa Penida host a large amount of marine life, like Hawksbill Turtle, Giant Sunfish, Giant Manta Ray, Giant Moray Eel, Bumphead Parrotfish, Hammerhead Sharks, Reef Sharks, Barracudas, Sea Snakes and so on. Dolphins are commonly encountered on the north coast near Singaraja and Lovina.
Due to human influence many plants have been introduced by humans within the last centuries, particularly since 20th century, making it sometimes hard to distinguish what plants are really native. From the larger trees most common are: Banyan trees, Jackfruit, coconuts, bamboo species, acacia trees and also endless rows of coconuts and banana species. Numerous flowers can be seen: Hibiscus, frangipani, bougainvillea, poinsettia, oleander, jasmine, water lily, roses, begonias, orchids and hydrangeas exist. On higher grounds that receive more moisture, like around Kintamani, certain species of fern trees, mushrooms and even pine trees thrive well. Rice comes in many varieties. Other plants with agricultural value include: salak, mangosteen, corn, Kintamani orange, coffee and water spinach.