Masai Mara National Park in Kenya is directly connected to the more popular Serengeti National Park in Tanzania. There is estimated to be around 2000 lions left in Kenya. The Mara Predator Project attempts to track the lion population within the park. The lions have a complicated relationship with the pastoral Masai people in the area. Killing of lions had previously been a rite of passage for young warriors. Lions will often kill livestock, and they are sometimes killed by the Masai in retaliation.