Doddering now, greyest heron (5,5)

I believe the answer is:

snowy egret

'heron' is the definition.
(I know that snowy egret is a type of egret)

'doddering now greyest' is the wordplay.
'doddering' indicates an anagram (I've seen this in other clues).
'now'+'greyest'='nowgreyest'
'nowgreyest' with letters rearranged gives 'SNOWY EGRET'.

I've seen this clue in The Everyman puzzle in The Observer.

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