What could we do next? What could you do next?
First, test the assumption that terminal song is more energetically demanding than introductory song in House Wrens by measuring the energy (in decibels) of those respective parts.
Second, to determine whether terminal song duration truly reflects male quality, measure House Wren songs and relate them to some measure of reproductive success, such as the number of offspring he produces in a breeding season.
Third, and possibly most interesting, create an experiment using House Wrens to test whether or not the amount of energy in a song/the duration of the terminal song will impact the female’s choice by playing experimental songs to females and recording their behavior.
Second, to determine whether terminal song duration truly reflects male quality, measure House Wren songs and relate them to some measure of reproductive success, such as the number of offspring he produces in a breeding season.
Third, and possibly most interesting, create an experiment using House Wrens to test whether or not the amount of energy in a song/the duration of the terminal song will impact the female’s choice by playing experimental songs to females and recording their behavior.