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SpatialPolygonsDataFrame Study area boundary of two Blue Tit populations: Kolbeterberg, Vienna, Austria (1998 through 2004) and Westerholz, Bavaria, Germany (2007 through 2011) .
SpatialPolygonsDataFrame
A SpatialPolygonsDataFrame with 12 SpatialPolygons.
numeric. The year of the observation.
# NOT RUN { data(bluetit_boundary) summary(bluetit_boundary) # }
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