Fig. 1

Percentage (± 95% credible intervals) of (a) clutches with at least one extra-pair offspring, (b) extra-pair offspring in all clutches including the clutches with zero extra-pair offspring, (c) extra-pair offspring for clutches that contained at least one extra-pair offspring (EPO). The results are separately presented for all genotyped clutches and offspring (grey circles), clutches in which all offspring had been genotyped (black circles) and clutches for which at least one offspring was not genotyped due to partial-brood loss (incompletely genotyped clutches, open circles). Extra-pair paternity was higher in black coucals than in white-browed coucals, and incomplete genotyping resulted in a substantial underestimation of extra-pair paternity in black coucals. The proportion of extra-pair offspring in clutches that contained at least one extra-pair offspring was similar in the two species (c). A lack of overlap of the 95% credible intervals of one group with the posterior mean of any other group indicates a statistically meaningful difference between those groups. The numbers above the error bars refers to the number of genotyped clutches or offspring, respectively