White peacocks or peafowls are unique and rare white leucistic birds and they also look very beautiful. They are often mistaken as albinos, while in reality they are leucistic. In fact many leucistic animals and birds are often mistaken as albinos. Interestingly, this condition is also described as "albinoid" which means leucistic. The similarity in words "albinoid" and albinos shouldn't misguide you since these are different conditions. Albinoid means leuicistic or have the condition of leucism while albino means the condition is albinism.
Being albino means there is a complete lack of pigmentation which is usually a congenital condition, while being leucistic or albinoid means there is a partial lack of pigmentation.