Fig. 2

Percentage (± 95% credible intervals) of clutches containing extra-pair young in relation to clutch size in (a) black coucals and (b) white-browed coucals, presented separately for completely genotyped clutches (black circles) and incompletely genotyped clutches (open circles). In black coucals, larger and completely genotyped clutches were more likely to contain extra-pair offspring than smaller clutches, or clutches that had not been genotyped completely. In white-browed coucals no such relationships existed, but extra-pair paternity was low. The numbers above the error bars represent the sample size (number of clutches). For the interpretation of statistical differences using posterior means and 95% credible intervals see Fig. 1 and methods