Dataset: bird_migration.csv

Source: D. Rubolini, F. Spina, N. Saino (2005). "Correlates of Timing
of Spring Migration in Birds: A Comparative Study of trans-Saharan
Migrants," Biological Journal of the Linnean Society, Vol. 85, pp.199-210.


Description: Study relating various predictors to Spring migration
date for 38 bird species. Variable names in parantheses 
Y = Median date of migration for species: 1=April 1   (migDate)
Predictors:
mean latitude og breeding  (latBreed)
mean latitude of wintering (latWntr)
sexual dichromatism        (sexDchrm)
nesting site:  0=open, 1=cavity  (nestSite)
time of moult: 0=no complete moult in winter quarters, 1=complete (moult)
wing length of males  (mWngLn)
wing length of females  (fWngLn)

Other Variables:
speciesID
species1
species2
number of birds for the species (numSpecies)
X = latWntr
Y = migDate