Elephants, it turns out, are surprisingly stealthy. As the sunlight fades, other species declare their presence. Throngs of zebras and wildebeests thunder by in the distance, trailing dust clouds. Cape buffalo snort and raise their horns and position themselves in front of their young. Giraffes stare over treetops, their huge brown eyes blinking, then lope away in seeming slow motion. But no elephants.

On an overcrowded planet where more species slip toward extinction every day, should one species have the right to multiply and consume at will, even as it nudges others to oblivion?

Elephants, it turns out, are surprisingly stealthy. As the sunlight fades, other species declare their presence. Throngs of zebras and wildebeests thunder by in the distance, trailing dust clouds. Cape buffalo snort and raise their horns and position themselves in front of their young. Giraffes stare over treetops, their huge brown eyes blinking, then lope away in seeming slow motion. But no elephants.