Revision of the Avian Genus Passerella

Bücher

Angebote / Angebote:

Excerpt from Revision of the Avian Genus Passerella: With Special Reference to the Distribution and Migration of the Races in CaliforniaOf breeding birds of these six subspecies there are available fairly extensive series of each race from several localities, but the map (fig. N) will Show what vast stretches of country there are as yet not rep resented in collections. Series of summer birds from any one place are signally uniform in appearance, so it is evident that an explana tion of the great range of variation seen in series of migrants and winter birds is to be sought in the study of specimens from many summer stations - the variation in a series of stations rather than among many specimens from one place.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.