The book presents a detailed exploration of North American wildlife, drawing on decades of observation and field experience across the Rocky Mountains and the Yellowstone region. The author details the daily lives, defensive mechanisms, and social habits of various mammals, moving from the cunning coyote and the industrious beaver to the bounding blacktail and the mountain lion.
Peculiar habits of lesser-known creatures are examined, such as the pack-rat's mania for collecting shiny objects, the coneys storing hay in rock-slides, and the mole-gopher's relentless upheaval of the prairie soil. Each animal is depicted in its natural environment, facing the constant struggle for survival against predators, harsh winters, and human encroachment.
A significant portion of the text is devoted to the larger ungulates, including the elk, moose, and buffalo, tracing their historic ranges, their mating rituals, and the impact of conservation efforts. The author details the fierce bugling of the elk in autumn and the dramatic encounters between predators and their prey in remote wilderness areas.
The narrative also sheds light on the misunderstood characters of the wilderness, defending the skunk and the badger against popular prejudice. Through patient observation, the author reveals the surprising gentleness and complex social structures of these maligned animals, noting instances of interspecies companionship and remarkable intelligence.
Moving through forests, alpine peaks, and river valleys, the book covers famous fur-bearers like the marten and the otter, alongside the elusive lynx and the formidable grizzly bear. The author contrasts the quiet solitude of the remote mountain sanctuaries with the familiar scenes around park hotels where bears gather for food.
Throughout the work, the focus remains on concrete details and accurate behavioral patterns rather than romanticized portrayals. The survival strategies of each species are laid bare, showing how physical traits and inherited instincts combine to secure their place in the rugged landscape of the American West.
