Male birdsong has a great influence in the stimulation of female reproduction. However,
female physiological responsiveness to song may depend on the degree of complexity of
male song. This is expected because females of iteroparous organisms may increase their
fitness by matching their reproductive investment to the predicted value of each reproductive
attempt. To the extent that the expression of male ornaments is a signal of male quality, we
expect females to increase their investment when paired to highly ornamented males …