Pre-experiment baseline hair sample masses of the hair on the great tit eggs. Solid dots represent the mean pre-experiment baseline hair sample masses of the hair on the eggs in Oulu (n = 43) and Turku (n = 18), respectively. Bars represent confidence interval for the pre-experiment baseline hair sample mass at a 95% confidence level.
Loukola et al. BMC Evolutionary Biology 2014 14:32 doi:10.1186/1471-2148-14-32