Birds in wilderness (5)

I believe the answer is:

ernes

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

'in wilderness' is the wordplay.
'in' indicates a hidden word.
'ERNES' is hidden within 'wilderness'.

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

I've seen this clue in The Telegraph.

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