Figure 2.

Behavioural responses of control- and progesterone-implanted (P4) female black coucals during STIs. (a) P4-implanted females take longer to approach the decoy, (b) P4-implanted females do not come as close to the decoy, and (c,d) they vocalize less than control-implanted female black coucals during a 15-min STI. Numbers above bars indicate sample sizes and asterisk indicates significant differences. Please note that the bars in (a,c) represents the median and error bars indicate the interquartile range, whereas bars in (b,d) show back-transformed means and standard errors. Numbers above bars indicate sample sizes.