|Juvenile Sparrowhawk [it was misty!]|
A NOTE:What is noticeable is that BWPi [Birds of the Western Palearctic interactive] and Collins latest guide both show NO white patches in their illustrations of juveniles.... however, the videos on BWPi do show clearly visible white patches. Is this a case of drawing from preserved skins, all nicely groomed, or the same mistakes carried on blithley because "if it was drawn so originally, it must be right!"
Ted Ellis [a famous Norfolk naturalist] used to despair of tidying by artists.... his usual example was the holes round the edges of the older leaves of Butterbur [Petasites hybridus]. Never shown, but always there, caused by the Strawberry Snail [Trichia striolata].... and always edited out in the drawings.