Annual index results for Boreal Softwood Shield (BCR 8)

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 Boreal Softwood Shield (BCR 8)

Year	Annual index	Lower limit	Upper limit
1970	1.18	0.6	1.83
1971	1.14	0.569	1.76
1972	1.11	0.547	1.77
1973	1.31	0.745	2.08
1974	1.19	0.589	1.85
1975	1.27	0.7	1.94
1976	1.15	0.619	1.76
1977	1.28	0.717	1.92
1978	1.33	0.772	2
1979	1.25	0.673	1.86
1980	1.18	0.682	1.81
1981	1.35	0.739	2.06
1982	1.37	0.785	2.09
1983	1.09	0.608	1.69
1984	1.09	0.614	1.69
1985	1.03	0.574	1.6
1986	0.969	0.576	1.53
1987	0.939	0.535	1.39
1988	0.821	0.47	1.27
1989	0.764	0.408	1.13
1990	0.747	0.453	1.13
1991	0.715	0.399	1.05
1992	0.708	0.394	1.05
1993	0.664	0.365	0.974
1994	0.681	0.389	0.964
1995	0.699	0.387	1.02
1996	0.774	0.467	1.15
1997	0.666	0.416	0.966
1998	0.685	0.424	0.964
1999	0.615	0.336	0.904
2000	0.53	0.297	0.761
2001	0.598	0.368	0.888
2002	0.549	0.337	0.811
2003	0.526	0.309	0.747
2004	0.504	0.285	0.721
2005	0.5	0.284	0.72
2006	0.467	0.288	0.682
2007	0.446	0.268	0.627
2008	0.422	0.27	0.578
2009	0.445	0.275	0.633
2010	0.373	0.236	0.519
2011	0.398	0.265	0.562
2012	0.413	0.261	0.577
2013	0.337	0.208	0.466
2014	0.356	0.224	0.488
2015	0.346	0.233	0.484
2016	0.343	0.222	0.486
2017	0.292	0.17	0.421
2018	0.288	0.172	0.419
2019	0.309	0.201	0.444
2020	0.272	0.155	0.417
2021	0.283	0.179	0.415

Geographic area included in the Long-term trend for the 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 Boreal Softwood Shield (BCR 8)

• Newfoundland and Labrador (Boreal Softwood Shield (BCR 8))
• Ontario (Boreal Softwood Shield (BCR 8))
• Québec (Boreal Softwood Shield (BCR 8))

This web site may be cited as: Smith, A.C., Hudson, M-A.R. Aponte, V.I., English, W.B., and Francis, C.M. 2023. North American Breeding Bird Survey - Canadian Trends Website, Data-version 2021. 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