Ornithology

This is AMAZING! Until now I never fully understood how to tell the difference between male and female birds.

I always thought it could be quite difficult and had to sometimes be determined surgically.

However I have recently discovered a much easier technique. I'd like to share this skill with you:
    Below are two birds. Study them closely.... See if you can spot which of these two birds is the female. It can be done. Even by one with limited bird watching skills.