The sight of red triggers aggressive behavior in male Siberian Rubythroats (a bird species native to northeastern Asia; males have a red throat, but females do not) during spring, but provokes a much weaker response in fall and winter. Describe the probable physiological control mechanism for this difference in response to the sight of red at different times of year.
Such behavior of birds is due to the production of sexual hormones. Testosterone is a prime sexual hormones. When spring started the level of this hormone is increased. This is up to the end of the season of mating or hoti staring of winters where the level becomes low. The increased level of testosterone cause aggressive behavior in males and low level of testosterone does opposite of it
The sight of red triggers aggressive behavior in male Siberian Rubythroats (a bird species native to...