Author: Publisher:
ISBN:
Category : Birds
Languages : en
Pages : 36
Book Description
Training Guide for Bird Identification in Pacific Northwest Douglas-fir Forests
Author: Training Guide for Bird Identification in Pacific Northwest Douglas-fir Forests
Author: Training Guide for Bird Identification in Pacific Northwest Douglas-Fir Forests (Classic Reprint)
Author: Andrew B. CareyPublisher: Forgotten Books
ISBN: 9780266808541
Category : Music
Languages : en
Pages : 42
Book Description
Excerpt from Training Guide for Bird Identification in Pacific Northwest Douglas-Fir Forests The usefulness of the guide is in the written descriptions of bird calls, unencumbered (as much as possible) by superfluous text. The guide should be used as a dictionary. And it should be used in conjunction with field guides and recordings of bird calls and songs. Recordings specific to the region should be used whenever possible. Species are listed in taxonomic order to be compatible with field guides. Letter codes after the descriptions refer to references cited on pages 24 and 25. A checklist of species is included to further aid the novice in identifying species through the process of elimination and to aid the expert in recognizing unusual occurrences of birds. 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.
Training Guide for Bird Identification in Pacific Northwest Douglas-fir Forests
Author: Andrew B. CareyResearch Paper RMRS
Author: Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 636
Book Description
Monthly Catalog of United States Government Publications
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1112
Book Description
General Technical Report PNW-GTR
Author: Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 882
Book Description
General Technical Report PNW.
Author: Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 564
Book Description
Optimum Timeframes for Detecting Songbird Vocalizations in the Black Hills
Author: Todd R. MillsPublisher:
ISBN:
Category : Birdsongs
Languages : en
Pages : 392
Book Description
Birds are indicators of vegetation structure and ecological conditions. The singing activity of birds declines during late-morning periods, which can affect estimates of abundance and conclusions regarding vegetative conditions indexed by birds. Therefore, it is important to quantify periods of bird activity so biologists can plan studies. We determined hourly detections from singing males of 22 nongame bird species in ponderosa pine, quaking aspen, and grassland vegetation types in the Black Hills of South Dakota. Detections of 12 of 22 species differed among 1-hr intervals after sunrise. Detections of yellowrumped warblers, Townsend's solitaires, red-breasted nuthatches, western tanagers, and American robins decreased on count-episodes more than 4 hrs after sunrise. Detections of dusky flycatchers declined on count-episodes more than 3 hrs after sunrise and detections of black-capped chickadees were greatest during the first hour after sunrise and declined afterward. Detections of many other species from songs or calls decreased on count-episodes more than 5 hrs after sunrise. We recommend that bird counts in the Black Hills be completed within 4 hrs after sunrise so estimates of bird abundance are not affected by reduced singing among males.
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