Excerpt from The Birds of North and Middle America, Vol. 5: A Descriptive Catalogue of the Higher Groups, Genera, Species, and Subspecies of Birds Known to Occur in North America; Family Pteroptochidae, the Tapaculos; Family Formicariidae, the Antbirds; Family Furnariidae, the Ovenbirds Circumstances have retarded the completion of the present volume, chief among which were interruption by field work (including a second visit to Costa Rica), occasional periods of illness, and the Specially difficult character of some of the included groups; furthermore, one large family (the Woodpeckers, Picid'ae) was worked up and even set in type, but was finally omitted because its inclusion would increase the bulk of the volume far beyond a convenient Size. It will, there fore, be included in Part VI. 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.