Rangeland fences are an omnipresent barrier to the pronghorn, which is not designed for leaping high.
When it tries to squeeze under, it can be ensnared in a barbed wire death trap.
Mali elephants must travel in a perpetual migration across the arid Sahel region in search of food and water.
Their yearly 300-mile trek is the longest known elephant migration.
As the climate becomes more fickle and human demands on land and water increase,
these desert nomads face an ever more uncertain fate.