Trend results for Red-headed Woodpecker

A comprehensive assessment of this species' status is available, on the Status of Birds in Canada web site, or for waterfowl, in the most recent report on the Migratory game bird hunting.

Trend results can be filtered by selecting a new time period.


View definitions of the trend results table columns.

Select a geographic area name in the first column to view graphs of annual indices and maps of the regions included in the analysis. Use the scroll bar to view additional columns.

Short-term trend estimates for Red-headed Woodpecker in all regions of Canada
Geographic area Time period Annual trend Limits Overall reliability N routes Reliability details Probability of decrease Probability of increase Population change Population change - lower limit Population change - upper limit Probability of population change during time period
Lower Upper Geographic coverage Local data weight Precision >50% decrease 25%-50% decrease 0%-25% decrease 0%-33% increase 33%-100% increase >100% increase
Canada; Short-term 2011-2021 3.14 0.751 6.96 Medium 95 0.635 1 6.21 0.00367 0.996 36.2 6.25 94.1 0 0 0.00367 0.415 0.5527 0.0283
Manitoba; Short-term 2011-2021 3.41 0.575 7.59 Low 39 0.884 1 7.01 0.00333 0.997 39.8 5.9 108 0 0 0.00333 0.34 0.6067 0.0503
Ontario; Short-term 2011-2021 1.28 -2.59 5.49 Low 56 0.465 1 8.08 0.214 0.786 13.6 -23.1 70.6 0 0.00700000000000001 0.207 0.566 0.204 0.016
Boreal Taiga Plains (BCR 6); Short-term 2011-2021 3.45 -0.708 10.2 Low 10 0.814 1 11 0.0253 0.975 40.4 -15.9 152 0 0.00133 0.02397 0.346 0.503 0.126
Prairie Potholes (BCR 11); Short-term 2011-2021 2.93 -0.508 7.02 Low 25 0.91 1 7.53 0.024 0.976 33.5 -8.15 92.2 0 0.001 0.023 0.463 0.4763 0.0367
Boreal Hardwood Transition (BCR 12); Short-term 2011-2021 3.42 -0.142 9.37 Low 13 0.169 1 9.51 0.015 0.985 40 -4.46 139 0 0.001 0.014 0.349 0.534 0.102
Lower Great Lakes / St. Lawrence Plain (BCR 13); Short-term 2011-2021 -1.5 -6.19 4.22 Low 47 0.914 1 10.4 0.729 0.271 -14 -55 37 0.019 0.271 0.439 0.219 0.048 0.004
Manitoba (Boreal Taiga Plains (BCR 6)); Short-term 2011-2021 3.45 -0.708 10.2 Low 10 0.814 1 11 0.0253 0.975 40.4 -15.9 152 0 0.00133 0.02397 0.346 0.503 0.126
Manitoba (Prairie Potholes (BCR 11)); Short-term 2011-2021 2.93 -0.508 7.02 Low 25 0.91 1 7.53 0.024 0.976 33.5 -8.15 92.2 0 0.001 0.023 0.463 0.4763 0.0367
Manitoba (Boreal Hardwood Transition (BCR 12)); Short-term 2011-2021 2.59 -4.29 8.75 Low 4 1 13 0.147 0.853 29.2 -55.4 98.7 0.0143 0.0444 0.0883 0.422 0.3913 0.0397
Ontario (Boreal Hardwood Transition (BCR 12)); Short-term 2011-2021 3.45 -0.0887 10.2 Low 9 0.169 1 10.3 0.0173 0.983 40.4 -6.43 155 0 0.002 0.0153 0.346 0.516 0.121
Ontario (Lower Great Lakes / St. Lawrence Plain (BCR 13)); Short-term 2011-2021 -1.5 -6.19 4.22 Low 47 0.914 1 10.4 0.729 0.271 -14 -55 37 0.019 0.271 0.439 0.219 0.048 0.004

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
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