Normal Gray   I just got report that this is actually a male but in this photo he hasn't gone through his first moult.           The normal gray was the original color for the cockatiel.  They can been found in Australia as this color.  They
are also the most dominate of all the color mutations.  The first people to deal with the cockatiel were the
Aborigines,  they most likely ate them for food and poached their eggs!
    They appear gray with yellow on the face.  They have the two orange cheek patches that cockatiels are often
distinguished by.   This Photo came from  Mike Secorsky