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出版Canadian Wildlife Service, 1991
主題Nature / Birdwatching GuidesScience / Life Sciences / Zoology / OrnithologyTravel / Maps & Road Atlases
ISBN06621898769780662189879
URLhttp://books.google.com.hk/books?id=IF1GAQAAMAAJ&hl=&source=gbs_api
註釋Observations from more than 20,675 km of transects (10-minute counts) carried out during 45 ship-of-opportunity cruises from 1981-90 were analyzed to determine the seasonal distribution of 20 species of pelagic birds along the B.C. coast to 320 km offshore. The dates and locations of an additional 12 rare or accidental species were also mapped and tabulated. A description and a map of its distribution are included for each species.