50 Keystone Fauna Species of the Pacific Northwest
Collin Varner
Broschiertes Buch

50 Keystone Fauna Species of the Pacific Northwest

A Pocket Guide

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A compact, user-friendly guide to ecologically significant animal species of the Northwest Coast A keystone species is an organism that defines and supports an entire ecosystem, filling a vital ecological niche. Without these species, ecosystems would be radically altered or even collapse. This full-color, pocket-sized field guide by best-selling naturalist Collin Varner highlights fifty keystone birds, mammals, amphibians, insects, fish, shellfish, and mollusks found across the Pacific Northwest bioregion. Species profiled include the American crow, bald eagle, American beaver, California sea...