Head and breast difference between European, rain and harlequin quails

I wanted for a long time making this picture,
clearly showing the significant differences between three pure breeds of quail that some breeders have difficulty to differentiate, and that others shamefully cross together …
The pictures were taken on November 4th, 2011.
They are all males.
In the next future, I will try to take the time to make the same photo with three females.