New science shows that estimates of the African lion numbers are underpinned by weak methods. But several new studies from Kenya and Uganda show that lions can be counted robustly.
Intense and extensive changes mean that the Serengeti-Mara area's wildlife has an unsure future.
A billion dollars a year would secure Africa's lions and its landscapes as well as millions of people living nearby.
New findings show that the numbers of cubs a cheetah is able to rear is lower in areas that receive lots of tourists.
Cheetahs face a number of threats in the Maasai Mara landscape but there are efforts underway to help them overcome these.