The Kenya Wildlife Service and the Kenya Veterinary Department have poisoned hyenas on a wide scale to protect rancher's livestock, and this in turn is fatally affecting lions and other scavengers as well.
In 2012, a study published by Duke University found robust evidence of the connection between the alarming lion population decline and a 75 percent loss of habitable savanna land during the 50 year period. This is due to the increase in urbanization and the conversion of the lion's savanna habitat to farmland.
Conservationist and researcher, Stuart Pimm stated, "The word savanna conjures up visions of vast open plains teeming with wildlife. But the reality is that massive land-use change and deforestation, driven by rapid human population growth, has fragmented or degraded much of the original savannah. Only 25 percent remains of an ecosystem that once was a third larger than the continental US."
It's a two-fold problem. Because their home is being swallowed up by agriculture, lions are migrating into areas inhabited by humans and are preying on their livestock. In return, ranchers kill the lions and the horrible cycle continues.