Coyote Yip-Yip-Yip

-"The sound of coyotes howling and yipping at night sometimes causes people concern and alarm. Some mistakenly believe howling indicates that a group of coyotes has made a kill. While coyotes howl for a variety of reasons, it is not likely because they have downed prey. Doing so would draw attention and might attract competing coyotes or other predators to their location, which is not something a hungry coyote would want to do. Coyotes howl and yip primarily to communicate with each other and establish territory. They may bark when they are defending a den or a kill."  Thank you, WildlifeHelp.org
-A fairly common sound around southern Arizona