Excerpt from Field Notes on Amphibians, Reptiles and Birds of Northern Humboldt County, Nevada: With a Discussion of Some of the Faunal Features of the Region At the present time it is coming to be realized that there are other characters distinguishing species than those brought for ward through morphological researches, as, for example, those belonging to the domains of physiology and psychology. These characters, being less accessible and sometimes less tangible, offer more obstacles to precise definition than those others dealing with structure. Nevertheless, traits, habits, manners of perform ing particular acts, preferences of one kind and another, seem in most cases to be as definite and as constant characteristics of species as the shape and size of bill and feet, or coloration of fur and configuration of skull. An attempt has in this paper been made to place the emphasis upon such non-morphological characters, here mainly psychological. That the facts as recorded are in some cases fragmentary and unrelated to others indicates strongly the general desirability of putting on record such data as are available, to the end that later investigators in this field may at least benefit by that little which is at present known. This paper represents the completion of the report on the vertebrates of the Pine Forest Mountain region, the first major installment of which appeared as the Mammals of the Alexander Nevada Expedition of 1909 (taylor, While Mr. Richardson and the writer were carrying on field work in the Pine Forest Mountain region, Miss Alexander and Miss Kellogg were members of a palaeontological expedition working in the same general neighborhood (see Taylor, 1911, p. They incidentally collected specimens of vertebrates and made field notes. The results of their work as well as of our own have been incorporated into the present paper. The writer must acknowledge indebtedness to the following persons: to Professor Charles A. Kofoid, of the Department of Zoology of the University of California, for generous criticism; to Mr. Joseph Grinnell, Director of the Museum of Vertebrate Zoology of the University of California, for general direction and advice in connection with the paper; to Professor Harvey M. 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.