Few people would look to Singapore, an almost entirely urban first-world island nation, for nature and wildlife in Southeast Asia. But in fact the island, just 50 km. from east to west and 27 km. north to south, boasts an astonishing array of fauna in addition to the skyscrapers, stock markets and Sentosa resort. One of the world’s most densely populated nations, it boasts more than 8,200 residents per square kilometer.