The Co-operative Breeding Bird Survey in Canada, 1971 PDF Download
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Author: Anthony J. Erskine
Publisher:
ISBN:
Category :
Languages : en
Pages : 31
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Book Description
Reports on a co-operative attempt to detect and measure year-to-year changes in numbers of birds, chiefly songbirds, across Canada. Includes description of data collection and year-to-year comparison methods used, in addition to discussion of trends observed. Results presented includes coverage of bird survey routes; mean number per survey route of the 20 species recorded in the greatest numbers, by region; and changes in bird population indices for comparable survey routes, by region, with comparison to indices for previous years.
Author: Anthony J. Erskine
Publisher:
ISBN:
Category :
Languages : en
Pages : 31
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Book Description
Reports on a co-operative attempt to detect and measure year-to-year changes in numbers of birds, chiefly songbirds, across Canada. Includes description of data collection and year-to-year comparison methods used, in addition to discussion of trends observed. Results presented includes coverage of bird survey routes; mean number per survey route of the 20 species recorded in the greatest numbers, by region; and changes in bird population indices for comparable survey routes, by region, with comparison to indices for previous years.
Author: Anthony J. Erskine
Publisher: Fisheries and Environment Canada ; Ottawa : Available from, Printing and Publishing, Supply and Services Canada
ISBN:
Category : Nature
Languages : en
Pages : 72
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Book Description
1966-75 activities of the Breeding Bird Survey to detect and measure year-to-year and long-term changes in population of birds, particularly the smaller land birds.
Author: U.S. Fish and Wildlife Service
Publisher:
ISBN:
Category : Animals
Languages : en
Pages : 732
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Author:
Publisher:
ISBN:
Category : Canada
Languages : en
Pages : 864
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Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 262
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Author:
Publisher:
ISBN:
Category : Wildlife conservation
Languages : en
Pages : 1330
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Author: Wayne Campbell
Publisher: UBC Press
ISBN: 9780774806213
Category : Nature
Languages : en
Pages : 768
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Book Description
This much-awaited final volume of The Birds of British Columbia completes what some have called one of the most important regional ornithological works in North America. It is the culmination of more than 25 years of effort by the authors who, with the assistance of thousands of dedicated volunteers throughout the province, have created the basic reference work on the avifauna of British Columbia. Volume 4 covers the last half of the passerines and describes 102 species, including the warblers, sparrows, grosbeaks, blackbirds, and finches. The text builds upon the authoritative format of the previous volumes and is supported by hundreds of full-colour illustrations, including detailed distribution maps, unique habitat shots, and beautiful photographs of the birds, their nests, eggs, and young. In addition, a species update lists and describes 27 species of birds new to the province since the first three volumes were published. The book concludes with Synopsis: The Birds of British Columbia into the 21st Century, which synthesizes data and information from all four volumes and looks at the conservation challenges facing birds in the new millennium. The four volumes in The Birds of British Columbia provide unprecedented coverage of the region's birds, presenting a wealth of information on the ornithological history, regional environment, habitat, breeding habits, migratory movements, seasonality and distribution patterns of 472 species of birds. It is the complete reference work for birdwatchers, ornithologists and naturalists.
Author: John R. Sauer
Publisher:
ISBN:
Category : Bird populations
Languages : en
Pages : 184
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 768
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Book Description
Author: Martin K. McNicholl
Publisher:
ISBN:
Category : Birds
Languages : en
Pages : 296
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Book Description
