Excerpt from Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies; Order Passeriformes: Family Fringillidae, Vol. 3: Genera Zonotrichia Through Emberiza Literature Cited and Index In their detailed study of the species, Myron H. Swenk and Orin A. Stevens (1929) note: The vanguard arrives with remarkable uni formity during the first week in May or shortly thereafter at points over an area extending from the Dakotas to Minnesota and Manitoba. The passage of the vanguard across Saskatchewan, Alberta, and Northwest Territory to the breeding grounds of the species is made during the last half of May, though it is probably the middle of June before the migration of all the birds is completed. 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.