This year we have lots of rabbits and squirrels in the neighborhood and now we have a predator. It likes to get on roof gables and powerlines and screech and then swoop. I took a partial differential equations class back in college and one of the problems they had us work on is the mathematical relationship between the numbers of prey and predators. Turns out there there is no happy equilibrium. It cycles, the number of prey increases which after a delay increases the number of predators, and then they gobble up all the little cute prey animals and then the predators starve and the cycle starts anew.
I think it is a red shouldered hawk but I am in no way a birder so if somebody has a better id then please let me know. I submitted the pics to inaturalist dot org and they are waiting for more community ids. So it saw something, screeched and went swooping into a neighbor’s yard for something.