. The Canadian field-naturalist. Natural history. 1970 1975 1980 1985 1990 1995 2000. 1970 1975 1980 1985 1990 1995 2000 1970 1975 1980 1985 1990 1995 2000 Year Figure 2. Number of species observed each year on BBS routes. fragmented BBS routes, were either stable or slightly Bittern, Blue-winged Teal, Common Snipe and Sora increasing on the Bird River route. all declined significantly on one or more routes. Wetland-associated birds showed the largest Blue-winged Teal showed significant declines on decline in all five fragmented BBS routes. Many three of the BBS routes in the forest transition
. The Canadian field-naturalist. Natural history. 1970 1975 1980 1985 1990 1995 2000. 1970 1975 1980 1985 1990 1995 2000 1970 1975 1980 1985 1990 1995 2000 Year Figure 2. Number of species observed each year on BBS routes. fragmented BBS routes, were either stable or slightly Bittern, Blue-winged Teal, Common Snipe and Sora increasing on the Bird River route. all declined significantly on one or more routes. Wetland-associated birds showed the largest Blue-winged Teal showed significant declines on decline in all five fragmented BBS routes. Many three of the BBS routes in the forest transition habi- wetland species such as Pied-billed Grebe, American tat (Table 1). All five observers (Carlson, Kinnaird,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club
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