Primate Paradise of Gunung Leuser, Sumatra
Gunung Leuser National Park is not very far from Kuala Lumpur as the crow flies. A hop over the Makasar Strait and a journey of around 120 km from the metropolis of Medan up to the forested hills. In practice, the journey takes much of a day, including an hour in the air and four to five hours to cover the ground betwen Medan and Bukit Lawang. We made the journey last weekend for a couple of days of trekking and wildlife watching. A short hike from the friendly village of Bukit Lawang, over one of the bridges suspended across the river, past rubber trees in a small plantation, takes you to the entrance of the Gunung Leuser National Park. A short while later we met the first of three new (to me) primate species, the North Sumatra leaf monkey ( Presbytis thomasi ), charming with their crests and impish faces. Alfred Russel Wallace visited Sumatra from November 1861 to January 1862, but further south, where he also encountered Presbytis monkeys (presumably t