Data for shorebird migration across the prairie potholes in 2002 and 2011
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资源简介：
The data frame provides geo-referenced data on presence of six species of en route migrant shorebirds in wetlands within the prairie pothole region in the U.S. during the spring migration periods of 2002 and 2012. Surveys were conducted at wetlands within townships selected in a stratified random procedure, with strata based on landscape composition of agricultural cropland and total area of wetlands.
创建时间：
2018-01-01
