Bobolink Population Trends in the US and Canada (1966-2012)

Jul 12, 2016
Uploaded by Dan Lambert
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Description:
Polygon values represent an estimate of annual change in Bobolink abundance as a weighted average of trend information from nearby survey routes containing information for this species. Counts were conducted during fifty 3-min stops along a 24.5-mi road-based survey route between 1966 and 2012. Areas of increase are blue. Areas of decline are red.
Data Provided By:
Layer created by Dan Lambert from data provided by: Sauer, J. R., J. E. Hines, J. E. Fallon, K. L. Pardieck, D. J. Ziolkowski, Jr., and W. A. Link. 2014. The North American Breeding Bird Survey, Results and Analysis 1966 - 2013. Version 01.30.2015 USGS Patuxent Wildlife Research Center, Laurel, MD. http://www.mbr-pwrc.usgs.gov/bbs/
Content date:
1966-2012
Citation:
Sauer, J. R., J. E. Hines, J. E. Fallon, K. L. Pardieck, D. J. Ziolkowski, Jr., and W. A. Link. 2014. The North American Breeding Bird Survey, Results and Analysis 1966 - 2013. Version 01.30.2015 USGS Patuxent Wildlife Research Center, Laurel, MD. http://www.mbr-pwrc.usgs.gov/bbs/
Spatial Resolution:
21,475 m
Contact Organization:
not specified
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not specified
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None
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Dataset Type:
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Tags:
bobolink, grassland bird, midwest grasslands network, grassland, population trend
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About the Uploader

Dan Lambert
Ecologist with High Branch Conservation Services

I am a wildlife ecologist and conservation project leader with expertise in research, monitoring, and stewardship of vulnerable species and habitats.My work focuses on developing science-based, collaborative approaches to conservation challenges from coastal wetlands to mountain forests. I have led...