Blue was naturally also a symbol of the Nile and its associated crops, offerings and fertility. The phoenix, which was a symbol of the primeval flood, was patterned on the heron. Herons naturally have a gray-blue plumage. However, they were usually portrayed with bright blue feathers to emphasize their association with the waters of the creation. Amon was often shown with a blue face to symbolize his role in the creation of the world. By extension, the pharoahs were sometimes shown with blue faces as well when they became identified with Amon. Baboons, which are not naturally blue, were portrayed as blue. It is not certain why. However, the ibis, a blue bird was a symbol of Thoth, just like the baboon was. It may be that the baboons were colored blue to emphasize their connection to Thoth.