parakeet fleas

I need help in determining sex my parakeets?

I have two budgerigars. I buy one at a flea market and the other animals on earth company. The fact that I purchase at the flea market, the lady told me that was an adult, as they have white CERE. The land they bought in pet (feathers dark blue), the employee told me I was a young man. I have the both together and both have white CERE. I am confused and need your opinion. This link my help to see my photos parakeet. Thanks! Http: / / i688.photobucket.com/albums/vv249/2009handsome/103_0936.jpg http://s688.photobucket.com/albums/vv249/2009handsome/?action=view&current=103_0946.jpg http://i688 .photobucket.com/albums/vv249/2009handsome/103_0907.jpg

From the images, it is clear that they are females. Left one is the greatest. Both are now ready for mating with males. Their ceremonies were active from white to brown. Also look in the head, the left has a clear head and the other has some black lines vanish. Black lines on the head are the words of children. Now you buy a blue parakeet with flesh, will be a boy.

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