I have been breeding quails for many a year now and was absolutely sure that I know the birds and can colour sex the Pharoah Breed of Coturnix coturnix at the age of four weeks, 100 % successfully. Today I was selecting breeding hens out of a pen of 29 four week old female quails which were all very well marked with black spots and no red / brown feathers on the chests, as I have already separated them in male and female groups at three weeks of age. It is normal procedure for me to handle the birds and on feel and visual appearance select a few more than what I would require and then weigh them as well to assist my final selections. I selected 8 birds as I only needed one group of 6 females for a pen. There was this one female that caught my attention every time I handled or looked at her and when I weighed them, she was, at 220 grams, 24 grams heavier than the next best weighted bird of the selected group. I was overjoyed with this wonderful specimen and ringed her for future identification purposes. I worked through the rest of the birds and ended up with a very handsome group of 6 females. As I was clearing the workbench for the next task I heard a crow from the pen of selected hens and on closer inspection found my prized hen crowing.
This is very confusing as she has perfect hen markings and above all the males are always much lighter than the females. I am going to keep a close look at her / him and whichever way it goes, it will be a special bird. Either a VERY HEAVY male or a CROWING female.