I'm currently sitting at the back window watching a pair of Killdeer chasing each other around the field behind our house. My god, the noise these two are making! I'm not sure which one of them is making the noise like a dying squeak toy (not the typical Killdeer call), but maaaaan. They just keep chasing each other up and down the rows of leftover, dried corn stalks, seemingly squeaking as loudly and continuously as possible.
I love hearing the birds, don't get me wrong, but wow. So high-pitched it was starting to hurt my ears... and the pup wasn't overly fond of the sound, either.