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Population declines of farmland birds over recent decades in Europe, Canada and the USA have been attributed to more intensive agricultural management. We counted birds during the 1990 breeding season on 72 field sites in southern Ontario, Canada, paired between 10 organic and 10 conventional farms for local habitat to enhance our ability to detect effects of agricultural practices. Of 68 species...
We examined population trends and status in 37 taxa of Canadian raptors using Breeding Bird Survey (BBS) data (1966-1994 and 1985-1994) for the whole of Canada and seven ecozones separately, continent-wide Christmas Bird Counts (CBC) (1959-1988), migration counts from 12 hawkwatches (various dates) and specific research projects. According to the primary sources reviewed, many raptor populations...
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