I've been staying at an Air BnB, Old Moorens, Tresta, since Friday 9th June. I've heard a Cuckoo calling most days we've been here. I can here it calling now, heard it yesterday and the day before. Also heard it last Friday and Saturday. I see you reported a cuckoo at Kergord which is not far away and may be the same bird. Anyway, the bird is in Tresta regularly. I have a couple of Merlin app recordings and positive IDs from the app.

Regards,
David Hickson