Swainson's Thrush - Predicted Productivity Index

Mar 24, 2011 (Last modified Mar 28, 2011)
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Swainson’s Thrush is a medium sized (15-18cm) thrush which prefers to breed in dense shrub growth associated with spruce-fir forests. The "russet-backed" race prefers mixed forests and deciduous riparian woodlands of the coastal region from British Columbia, to northern California.  These Pacific populations winter in mature tropical and secondary forests of Central America, whereas the "olive-backed" race that breeds in the Boreal and Rockies winters in S. America. 

 

Models of Monitoring Avian Productivity and Survival (MAPS) demographic data and high-resolution land cover data showed that Swainson’s Thrush prefers large intact forest patches with low perimeter to area ratios.

On a regional scale productivity (reproductive effort) is higher at lower altitudes with more open canopy cover.

STAPI = productivity of Swainson's Thrush at each MAPS monitoring station calculated as the ratio of the total number of individual (i.e. uniquely banded) hatch year individuals to adult individuals


1.06432-(0.000119 * "gtopo30") - ( "pnr_lat_grid"* 0.013561) - (0.00219 * "nlcd01cc2k") - (0.000285 * "strmnet5k")


Definitions of these parameters and how they were derived can be found in


www.birdpop.org/downloaddocuments/PNW_Landscape_Analysis.pdf

Data Provided By:
Phil Nott, The Institute for Bird Populations
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conservation, pacific northwest, birds, swainson's thrush, productivity, model
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About the Uploader

Phil Nott, The Institute for Bird Populations
Research Ecologist with The Institute for Bird Populations

I'm a research ecologist and program director at the Institute for Bird Populations. My major role is researching the Monitoring Avian Productivity and Survivorship (MAPS) landbird monitoring database towards providing management models to land stewards. I have conducted three regional analyses of...