A recent study used NASA satellite-derived vegetation indices and other data to study elephants in Kenya’s Maasai Mara National Reserve, and in nearby semi-protected and unprotected zones. Researchers found that, especially in the unprotected areas, the elephants preferred dense canopy forest, particularly along streams, and avoided open areas like grasslands, especially when more people are present. Human development, such as tourism lodges, is often built in such forests.