I think what DeSwitch is trying to get at is owls do not exhibit sexual dimorphism(male & females looks alike). In fact many owls may have reverse sexual dimorphism, meaning females are bigger than males. The regulars say that it's mother & son is likely to be an assumption that the mother usually takes care of the child, in this case the son. However if you take the reverse sexual dimorphism in owls into account, then the juvenile which looks bigger than the adult may actually be female(daughter) & the adult the father. Hence it should be father & daughter. Of course this is again an assumption.
Anyway nice catch of both juvi & adult on the same perch.:thumbsup: