The black rhino is nature's tank, feared by all animals. Even lions will break off a hunt to detour around one. And yet the black rhino is on the edge of extinction, its numbers dwindling from 100,000 at the turn of the century, to less than 2,500 today. The reason is that in places like Yemen, China, Korea, Taiwan, and Thailand, the rhino's horn is more valuable than gold, so valuable that people will risk their lives to harvest it. To deter rhino poachers, African governments have spent millions--on helicopters, paramilitary operations, fences and guard dogs, even relocation to protected...

The black rhino is nature's tank, feared by all animals. Even lions will break off a hunt to detour around one. And yet the black rhino is on the edge of extinction, its numbers dwindling from 100,000 at the turn of the century, to less than 2,500 today. The reason is that in places like Yemen, China, Korea, Taiwan, and Thailand, the rhino's horn is more valuable than gold, so valuable that people will risk their lives to harvest it. To deter rhino poachers, African governments have spent millions--on helicopters, paramilitary operations, fences and guard dogs, even relocation to protected...

This examination of a depopulated species, the North American bison, provides insights into the past and present behaviour and ecology of what was once the continent's largest terrestrial mammal. The authors' research, conducted over a five-year period, attempts to resolve such questions as: what happens when only a small proportion of the male of a species mate?; why do animals in particular areas experience morphological malformations?; and how much genetic diversity has been lost since the 19th century? The study also discusses the consequences of mating failures, lineage differences in...

A look at what it takes for animals to live at the edges of existence. Each chapter of this book takes readers on a different journey to remote environs and in chase of an understanding of the species that live there.