Birds in higher nests (5)

I believe the answer is:

ernes

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

'in higher nests' is the wordplay.
'in' says the answer is hidden in the clue.
'ERNES' can be found hidden inside 'higher nests'.

(Other definitions for ernes that I've seen before include "Irish lough's" , "sea eagles" , "They fly across the sea" , "Sea-eagles" , "Certain birds" .)

I've seen this clue in the Sydney Morning Herald.

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