Annual index results for Québec (Lower Great Lakes / St. Lawrence Plain (BCR 13))

Annual index graph for: Bobolink

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 Bobolink in Québec (Lower Great Lakes / St. Lawrence Plain (BCR 13))
Year Annual index Lower limit Upper limit
1970 81.7 63.2 107
1971 86.8 67.8 114
1972 82.8 64.1 109
1973 76.4 57.1 101
1974 76 58.1 101
1975 75.2 58.4 99.2
1976 73.3 57.8 97.6
1977 70.6 54.5 92.1
1978 71 55.4 92.6
1979 70.8 56.5 91.6
1980 70 55.7 89.3
1981 71.2 56.3 93.1
1982 64.7 50.9 83.9
1983 60.9 47.6 78.1
1984 53.1 41.3 67.6
1985 50.9 40.5 66.3
1986 44.8 35.6 60.3
1987 37.8 29.7 48.9
1988 34 27.1 43.7
1989 30.5 24 38.8
1990 29 23.5 36.6
1991 27.3 21.8 34.7
1992 25.3 19.9 31.9
1993 24 19.4 29.9
1994 24.1 19.8 30.6
1995 23 18.5 28.8
1996 21.5 17.4 26.6
1997 20.5 16.6 25.6
1998 18.4 14.9 22.5
1999 17.4 14.3 21.8
2000 15.9 12.9 20.1
2001 14.7 11.9 18.4
2002 13.7 10.9 17.2
2003 12.7 10.1 15.9
2004 12.5 9.96 15.8
2005 11.5 9.2 14.5
2006 10.3 7.93 13
2007 10.3 8.25 12.9
2008 9.51 7.61 12
2009 9.04 7.15 11.4
2010 8.85 7.09 11.2
2011 8.44 6.81 10.9
2012 8 6.47 10.1
2013 7.31 5.92 9.24
2014 6.7 5.34 8.4
2015 6.14 4.89 7.77
2016 5.51 4.27 6.97
2017 5.18 4.05 6.59
2018 4.82 3.7 6.27
2019 4.37 3.29 5.81

Geographic area included in the Long-term trend for the Bobolink

Map displaying regions covered by analysis of species: Bobolink
      Coloured = Regions (analytical strata) included in trend estimate. The colour of the region reflects the approximate population trend in the region. The categories of trends based on the %/year values are indicated in the legend on the right, and the specific values can be found by searching on the analytical stratum trends for the same time-period and species.
      White = Regions not included in trend estimate

Bird Conservation Regions (BCR) with data included in Long-term trend estimates for Québec (Lower Great Lakes / St. Lawrence Plain (BCR 13))

Bird Conservation Regions (BCR) with data excluded from long-term trend estimates for Québec (Lower Great Lakes / St. Lawrence Plain (BCR 13)), but included in short-term estimates

This web site may be cited as: Smith, A.C., Hudson, M-A.R. Aponte, V.I., and Francis, C.M. 2020. North American Breeding Bird Survey - Canadian Trends Website, Data-version 2019. 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.

  1. Smith, A. C., & Edwards, B. P. M. (2020). North American Breeding Bird Survey status and trend estimates to inform a wide range of conservation needs, using a flexible Bayesian hierarchical generalized additive model. The Condor, duaa065. https://doi.org/10.1093/ornithapp/duaa065
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