During which of the following periods have the testosterone levels in the male song sparrow (Melospiza melodia) been found to be highest? A) During the initial period of territory establishment and when the female is laying the first clutch of eggs. B) During the initial period of territory establishment but only after a second female has also begun laying eggs. C) While maintaining an established territory and when the female is laying a second clutch of eggs. D) Testosterone levels remain at consistently high levels throughout the breeding season.

Question

Quizplus · Accepted Answer

Testosterone levels in male song sparrows are highest during the initial period of territory establishment and when the female is laying the first clutch of eggs, as this is when males are most aggressive and involved in mating behaviors.

During Which of the Following Periods Have the Testosterone Levels