Designated by the Maasai people, Randilen is a community wildlife management area of 327 km², which extends organically from Tarangire National Park's north-eastern boundary and adheres to strict ecological principles that benefit both wildlife and the community. In the dry season between July and October, wildlife is concentrated around a few water sources, particularly the Tarangire River Valley. Wildlife moves into the surrounding hills during the green season, which comes alive with lushness, flowering blooms, epic skies, and exuberant wildlife. Aside from elephant and buffalo, species most likely to be seen are giraffe, zebra, wildebeest, waterbuck, bushbuck, impala, lesser kudu, eland and warthog. Among the predators are lion and leopard, as well as jackals and mongoose.