This MISTLE THRUSH must have been a particularly white-looking juvenile but with regular colouring to its new adult feathers. It appeared both obviously white-headed & small-headed even at distance due to its moult. It showed regular adult plumage below the shoulders, very white juvenile feathers across the chest & speckled through the mantle, & moulted out juvenile head feathers with adult feathers yet to grow through.
(Thanks to Samuel Perfect for noting that particularly white juvenile feathers do not necessarily mean the bird shows any leucism.)
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| White-headed Juvenile to Adult moulting MISTLE THRUSH at Gadebridge Park |
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