It has been estimated male American goldfinches outnumber females.  The ratio of this imbalance is three males to every two females.

       Researchers have not determined why this is the case.  One theory is it is due to the fact males live longer than females.

       Do you see more male American goldfinches than females in your yard?  I am certain I do not know if the ratio holds true in my backyard.  However, I am going to find out.