A general question is, are the eggs of the different sub-species distinct so that they are adapted to a particular foster-parent species?
Specifically, we can ask, are the mean lengths of the cuckoo eggs the same in the different sub-species?
Cuckoo Egg Length Data.
Df Sum of Sq Mean Sq F Value Pr(F) birdSpecies 5 42.93965 8.58793 10.3877 3.152104e-08 Residuals 114 94.24835 0.82674
USGS Patuxent Wildlife Research Center (http://www.mbr-pwrc.usgs.gov/).
Bret Larget, firstname.lastname@example.org