Raw migratory connectivity data

Data were extracted from the literature (see Materials & Methods), and essentially represent start and end points (i.e. breeding and non-breeding locations) of the migration routes of individual tracked migrants land-birds. Named variables are defined as follows: "system" (TEXT) - migration system; "afro" = Afro-Palearctice, "neo" = Neotropical "study" (TEXT) - data source; see Supplementary Materials for full citations "species" (TEXT) - species common name "family" (TEXT) - taxonomic family "order" (TEXT) - taxonomic order "popunique" (NUMERIC) - arbitrary code grouping individuals from the same species into unique populations separated by < 100km. Typically, this means grouping individuals from the same study site into populations. "method" (NUMERIC) - tagging method; 1 = solar geolocator, 2 = GPS, 3 = satellite tag "sampledat" (NUMERIC) - sampling site; 1 = breeding site, 2 = non-breeding site "age" (NUMERIC) - age of bird; 0 = juvenile (first migration), 1 = adult, blank = unknown "country" (TEXT) - tagging country "state" (TEXT) - tagging state / province (for USA and Canada) "year" (NUMERIC) - year of tagging (2014 = 2014/15 migration period); blank if unknown "blat" (NUMERIC) - latitude of tagging site in decimal degrees "blon" (NUMERIC) - longitude of tagging site in decimal degrees "wlat1" (NUMERIC) - latitude of first winter site in decimal degrees "wlon1" (NUMERIC) - longitude of first winter site in decimal degrees "wlat2" (NUMERIC) - (if applicable) latitude of second winter site in decimal degrees "wlon2" (NUMERIC) - (if applicable) longitude of second winter site in decimal degrees "wlat3" (NUMERIC) - (if applicable) latitude of third winter site in decimal degrees "wlon3" (NUMERIC) - (if applicable) longitude of third winter site in decimal degrees "notes" (TEXT) - additional notes