Lots of choices.
One possibility is the "American Bittern" - https://www.allaboutbirds.org/guide/American_Bittern/id
(via https://motherboard.vice.com/en_us/article/listen-to-the-5-dumbest-sounding-birds-of-north-america found by doing a search for "bird sound water dripping" or similar).
Brown-headed Cowbirds are another popular answer, but those seem pretty involved (unless the high-pitched stuff is being attenuated).
HTH a little!
Cheers,
Scott.
(Mocking birds around here make all kinds of racket when they're chatting - not just a single sound like that.)
(via https://motherboard.vice.com/en_us/article/listen-to-the-5-dumbest-sounding-birds-of-north-america found by doing a search for "bird sound water dripping" or similar).
Brown-headed Cowbirds are another popular answer, but those seem pretty involved (unless the high-pitched stuff is being attenuated).
HTH a little!
Cheers,
Scott.
(Mocking birds around here make all kinds of racket when they're chatting - not just a single sound like that.)