|
|
|
|
| |
| Location: |
Asia - South East Asia - Malaysia - Sarawak |
| Subject: |
Ecology - Census Methods |
| Species: |
Black Rhino |
 |
|
The best way to accurately determine Sumatran rhino densities is extensive patrolling of a single, large study site over a long period of time. Only short time available. Unpredictable weather presented the biggest problem. The ground had to be wet enough so that we could find clear footprints. Continual heavy rains would slow us down and wash away prints before we could see them.
When rhinos use an area, they create wide and obvious 'highways' along ridges and waterways, often with distinctive scrape marks and dung deposits. They follow these well established paths repeatedly and over long distances. As rhinos travel, they spend time feeding on leaves, stems and twigs, leaving behind broken and twisted saplings and heavily trampled undergrowth. Rhinos also use salt licks and mineral springs, which are often located close to waterways where the soft ground allows easy identification. Another distinctive trait is the habit of taking mud baths several times a day. Where they travel regularly, rhinos make wallows, or depressions in the soil, that often take on the shape of the animal. These wallows are filled with a clay 'broth' that covers the rhino's body with a layer of mud, which keeps the animal's skin moist and protects it against biting insects. After leaving wallows, rhinos rub their heads and bodies on trees nearby, leaving unmistakable marks.
|
|
|
On the horns of a dilemma
File available
details
Original text on this topic: