First cuckoo heard - NOT amateur radio

At one time we heard cuckoos every spring. These days they appear far rarer. 

On our visit to Anglesey Abbey after lunch we heard one. 

They often lay a single egg in a reed warbler's nest. I suspect the one we heard was beside the water. It was very clear.

See https://www.rspb.org.uk/birds-and-wildlife/wildlife-guides/bird-a-z/cuckoo/ .