Nice melody reminds me of Bellamy's 'Gulls by the Shore' a little but that may be just the line length deluding me.

I heard a 3 note cuckoo early this spring, nr Barningham. Co.Durham though south of the Tees. No one else about, just moor and sheep. Sometimes the regular Cuck-coo (two note interval?) but interspersed with the inclusion of a middle note, top and bottom staying the same. Cuck-cuck-coo three notes perfectly in a row.