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Historically it has been one of the most identifiable sounds of spring.
But now the cuckoo has joined the 'red list' of the most threatened birds.
Its numbers have declined by nearly half since 1994 and they have totally disappeared from parts of the south of the country.
The RSPB is puzzled as to why numbers should be decreasing so rapidly and its scientists are now on the case.
Have you heard one this year? Tell us here. |