Excerpt from Draft Recovery Plan for the Shasta Crayfish (Pacifasticus Fortis) Habitat Requirements and Limiting Factors: Shasta crayfish primarily live in cool, clear, spring-fed headwaters that are characterized by clean volcanic cobbles and boulders on top of sand or gravel. The volcanic cobble and boulders are essential habitat components because they provide protective cover for the crayfish. The main threats to Shasta crayfish include: major land reclamation. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.