Bill D., there are three kinds of cuckoo in North America,

mangrove cuckoo
black-billed cuckoo
yellow-billed cuckoo.

Here's a page where you hear the black-billed cuckoo. (You may have to scroll down to get to the PLAY button. ) The bird seems to think it is 23 o'clock.


listen

JHW, I don't think this thread belongs under BS. Threads about sound go upstairs.