The sipoo
data frame contains data of occurrences of 50 land
bird species on 18 islands in the Sipoo Archipelago (Simberloff &
Martin, 1991, Appendix 3). The species are referred by 4+4 letter
abbreviation of their Latin names (but using five letters in two
species names to make these unique).
The sipoo.map
data contains the geographic coordinates of the
islands in the ETRS89-TM35FIN coordinate system (EPSG:3067) and the
areas of islands in hectares.