No, not screaming Chachalacas, & hope to never hear one except in a park. Am pretty sure it is a nightjar thanks (Bisbee Gal) with lots of friends. They were back again last night, we will leave several outside lights on for a few more nights. We have lived full-time in our house since 2005 & have never been kept awake by nature before. Not a deal breaker for our love of Mexico but a good night's sleep is underrated until you miss several!
Thanks for all the input.