format
A data.frame with 41 rows and 3 columns (species_name, clutch_size and body_mass).source
ll{
Life history data compiled from various published papers.
The breeding range files available in /extdata/wrens/vector/ package directory are available online at http://www.natureserve.org/getData/dataSets/birdMapData/wrens.zip. Data provided by NatureServe in collaboration with Robert Ridgely, James Zook, The Nature Conservancy - Migratory Bird Program, Conservation International - CABS, World Wildlife Fund - US, and Environment Canada - WILDSPACE.
}Breeding ranges post-processing
Each species range file was imported to a postgres database and its geometry simplyfied using SELECT ST_AsText(ST_Transform(ST_SimplifyPreserveTopology(ST_GeomFromText(ST_AsText(the_geom), 4326), 0.1),3975) ) as geom, "SCI_NAME" FROM "wrens".' range_name 'where "ORIGIN" in (1,2) then saved back to shp format. The resulting proj4string spatial projection is "+proj=cea +lon_0=0 +lat_ts=30 +x_0=0 +y_0=0 +ellps=WGS84 +datum=WGS84 +units=m +no_defs".