Deceives the birds (5)

I believe the answer is:

gulls

I believe this is a double definition.

'deceives' is the first definition.
(gulling is a kind of deceiving)

'the birds' is the second definition.
(gull is a kind of bird)

(Other definitions for gulls that I've seen before include "Seabirds - dupes" , "mugs" , "Aquatic birds" .)

I've seen this clue in the Evening Standard.

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