Annual index results for Ontario (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 Ontario (Boreal Softwood Shield (BCR 8))

Year	Annual index	Lower limit	Upper limit
1970	0.147	0.00491	0.363
1971	0.202	0.0098	0.496
1972	0.141	0.00848	0.348
1973	0.333	0.0751	0.728
1974	0.138	0.0181	0.322
1975	0.765	0.247	1.49
1976	0.246	0.0687	0.467
1977	0.554	0.167	1.06
1978	0.529	0.176	1.02
1979	0.301	0.072	0.602
1980	0.249	0.0813	0.477
1981	0.431	0.171	0.807
1982	0.41	0.0947	0.907
1983	0.117	0.0106	0.277
1984	0.214	0.0267	0.46
1985	0.141	0.0116	0.337
1986	0.137	0.00934	0.337
1987	0.246	0.0748	0.47
1988	0.141	0.0371	0.286
1989	0.0982	0.0206	0.198
1990	0.107	0.0238	0.219
1991	0.206	0.0764	0.4
1992	0.0683	0.0067	0.16
1993	0.124	0.0325	0.252
1994	0.107	0.019	0.217
1995	0.125	0.0103	0.325
1996	0.186	0.0345	0.472
1997	0.0944	0.00754	0.228
1998	0.161	0.0541	0.318
1999	0.119	0.0177	0.299
2000	0.0546	0.00362	0.126
2001	0.0939	0.0059	0.249
2002	0.0787	0.00488	0.195
2003	0.0742	0.00273	0.188
2004	0.066	0.00695	0.143
2005	0.0818	0.0073	0.228
2006	0.0726	0.0147	0.152
2007	0.098	0.0293	0.199
2008	0.0554	0.00786	0.121
2009	0.0513	0.00965	0.111
2010	0.0631	0.0139	0.13
2011	0.0563	0.00317	0.135
2012	0.106	0.0303	0.218
2013	0.0537	0.00609	0.115
2014	0.0724	0.0128	0.166
2015	0.0741	0.016	0.148
2016	0.0936	0.0141	0.223
2017	0.0521	0.00705	0.115
2018	0.0658	0.0048	0.156
2019	0.142	0.0314	0.295
2020	0.0534	0.00231	0.15
2021	0.0414	0.00184	0.112

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 Ontario (Boreal Softwood Shield (BCR 8))

• Ontario (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