This morning there was a commotion out in the old apple tree. The bluejays and bluebirds were all upset. The cause was a new-to-us bird sitting on a branch. We looked it up, and lo and behold it was a black-billed cuckoo. We clapped our hands and it flew away, though not far. I think the birds were concerned because there are nests nearby. It didn't make the 'cuckoo' sound but the alternative sort of croaky sound that cuckoos make. This is the closest we found to the sound we heard.
I DID NOT take this wonderful photo, but found it here.
I'll leave you with a beautiful song in Middle English.