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Introduction : 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...
SWTH range map
Breeding season detections from all Ebird reocrds
This map shows the Swainson's Thrush conservation element data in the CYR study region. Layers include: Current potential habitat distribution for Swainson's thrush in the CYR study area; Change in mean April-May temperature from the 2010s to the 2060s within the Swainson's thrush potential habitat distribution; Change in growing season length from the 2010s to the 2060s within the Swainson's thrush potential habitat distribution; Current (2015) and long-term future (2060) extent of ALFRESCO forest classes and the potential habitat distribution of Swainson's thrush; Current, near-term, and long-term landscape condition within the potential habitat distribution of Swainson's thrush. These data are provided by Bureau...
Types: Live Data;
Tags: 179788,
BLM,
Bureau of Land Management,
CYR 2013,
Central Yukon, All tags...
DOI,
Geospatial,
MapServer,
REA,
Rapid Ecoregional Assessment,
Swainson's Thrush,
Terrestrial Species,
Wildlife,
biota,
liveData,
service, Fewer tags
Breeding Bird Survey Relative Abundance for Swainson's Thrush
10km grid of mean adult wing length
Winter wing length from MoSI data
( "pnr_lat_grid" * 0.08576) + (0.01474 * "nlcd01cc10k") - (0.02902 * "nlcd06af90pr") - (0.45815 *"gtopo30_ln). Trimmed with 990m-resolution masks representing the forest layer (NLCD 2006) and excluding cells in which agriculture covers greater than 33% of area. Range of adults allowed was 0-55 representing 95% confidence limits of input data.
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