Lions have disappeared across Africa as human populations and their livestock herds have grown, competing for land with lions and other wildlife. Wild savannas are converted for agriculture, and cattle (the lion's natural prey) is hunted out. Also, lions are killed by pastoralists fearing the loss of their herds.
If conservation efforts are not increased, it's likely that we will continue to see a decline in this big cat species.
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Photo Credit: ScienceDaily.com