Rhinos are broadly split into two categories – grazers and browsers – based upon their style of feeding and the types of food they eat. Grazers prefer grasses and typically feed low to the ground. Browsers favor leaves, twigs and hanging fruits, which often focuses their attention above eye level. Grazers might be likened to lawn mowers, heads held low and broad mouths sweeping the ground. Browsers are more like pruning shears, with narrower, prehensile lips reaching upwards into the trees.
The wide-mouthed white rhino of Africa is the consummate grazer. Short grasses are its favorite foods. The greater one-horned or Indian rhino is more difficult to categorize – sometimes a grazer and other times a browser. It likes tall grasses, but also consumes leaves, branches and submerged aquatic plants. The black rhino, which may share African grassland or savanna habitats with its white rhino cousin, is a browser that consumes significant roughage, like the thorny branches of acacia or fleshy plants like euphorbia that produce noxious chemicals.
Tropical forest species like the Javan and Sumatran rhino are obligate browsers, surrounded by a diverse buffet of leafy plants. Hundreds of species comprise their diets. At the Sumatran Rhino Sanctuary, where the resident rhinos have access to large forest enclosures in which they’re free to browse (the verb), the animals are also given more than two dozen different kinds of browse (the noun) every day. Their eclectic diet includes wild relatives of species like coffee, rubber, breadfruit and poinsettia. They also seem to favor the aromatic leaves and bark of species related to common herbs and incenses – basil, mint, rosemary, sage, frankincense and myrrh. Some Sumatran rhino food plants are known to be excellent sources of vitamin C. Others produce toxic alkaloids that have been used by traditional hunters to produce arrow poisons. How they know which ones to choose and how much of each to eat is still to be learned.
The Sumatran Rhino Sanctuary (SRS) is a center for managed breeding and research located in Indonesia’s Way Kambas National Park. To learn more about how the SRS contributes to the survival of this critically endangered species, go to: http://www.rhinos.org/sumatran-rhino-conservation-program.













The elephants stayed in our camp until around 3:00 am, rummaging around. We were excited to see them, but also a little nervous because we know that elephants are unpredictable, and can sometimes be aggressive – especially if they are protecting a calf. We didn’t sleep well at all that night because we had to keep an eye on the elephants. The next night, the elephants came back to our camp at just around the same time, and again stayed until around 3 am. The next day, one of my fellow RPU members and I had set up my camera with tripod and lights, to try to get photos of the elephants if they came back. We found a
good position and waited for around 3 hours. Luckily, the elephants found us right around sunrise and I was able to take photos of the mother and calf without disturbing them. Around 7 am, the elephants left our camp and marched deep into the forest. After that, we didn’t see the group again.
elephants because of the high demand for ivory on the black market. Although we are part of the Rhino Protection Unit, we are also committed to protecting the other animals living in the national park, and especially elephants and tigers. Protecting rhinos means protecting all wildlife living in the park. We also track and monitor elephants and tigers, remove snares and traps set for these animals, and collect evidence on and arrest poachers targeting elephants and tigers. We want to preserve all of Sumatra’s unique wildlife for our children and grandchildren to see. 
