The rhinoceros population has grown in West Bengal's Gorumara National Park. The same trend is thought to have occurred in the adjoining Jaldapara Wildlife Sanctuary, wildlife authorities say. A census earlier this month revealed that the number of rhinos in the Gorumara Park had risen by four since the last count was made two years ago, taking the population to 31. The figure might not look significant, "but is good news' officials said.