Annual index results for Canada

Annual index graph for: Chimney Swift

Note: the range of the vertical axis has been scaled to highlight pattern in the annual indices. If estimates are imprecise, the graph may not include the upper credible limits.

View definitions of the annual index table columns.

Annual indices for Chimney Swift in Canada
Year Annual index Lower limit Upper limit
1970 0.825 0.67 1.06
1971 0.825 0.683 1.04
1972 0.695 0.574 0.859
1973 0.687 0.568 0.845
1974 0.606 0.504 0.743
1975 0.609 0.501 0.758
1976 0.526 0.438 0.645
1977 0.508 0.418 0.618
1978 0.472 0.396 0.576
1979 0.555 0.46 0.687
1980 0.483 0.406 0.601
1981 0.427 0.36 0.514
1982 0.406 0.334 0.504
1983 0.428 0.352 0.532
1984 0.363 0.304 0.449
1985 0.379 0.311 0.474
1986 0.362 0.293 0.458
1987 0.314 0.259 0.398
1988 0.33 0.27 0.421
1989 0.336 0.269 0.46
1990 0.26 0.216 0.316
1991 0.283 0.234 0.349
1992 0.285 0.234 0.351
1993 0.201 0.166 0.245
1994 0.248 0.206 0.309
1995 0.196 0.162 0.241
1996 0.219 0.183 0.268
1997 0.196 0.161 0.241
1998 0.186 0.153 0.23
1999 0.181 0.145 0.232
2000 0.199 0.16 0.255
2001 0.178 0.143 0.233
2002 0.174 0.141 0.222
2003 0.174 0.14 0.222
2004 0.151 0.12 0.191
2005 0.163 0.133 0.209
2006 0.115 0.093 0.145
2007 0.131 0.104 0.17
2008 0.113 0.092 0.141
2009 0.115 0.092 0.147
2010 0.13 0.103 0.173
2011 0.106 0.082 0.137
2012 0.14 0.107 0.192
2013 0.102 0.079 0.138
2014 0.089 0.069 0.115
2015 0.092 0.072 0.123
2016 0.089 0.069 0.119
2017 0.101 0.079 0.132

Geographic area included in the Long-term trend for the Chimney Swift

Map displaying regions covered by analysis of species: Chimney Swift
      Red = Regions (analytical strata) included in trend estimate
      White = Regions not included in trend estimate
      Grey = Regions with no Breeding Bird Survey data

Bird Conservation Regions (BCR) with data included in Long-term trend estimates for Canada

This web site may be cited as: Smith, A.C., Hudson, M-A.R. Aponte, V., and Francis, C.M. 2019. North American Breeding Bird Survey - Canadian Trends Website, Data-version 2017. Environment and Climate Change Canada, Gatineau, Quebec, K1A 0H3

Any use of these BBS results for Canada should acknowledge the hundreds of skilled volunteers in Canada who have participated in the BBS over the years and those who have served as provincial or territorial coordinators for the BBS.

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