I may have posted this before or maybe on UB board. Had never used the siren to locate coyotes, just find areas with scat and tracks set up and call. However after reading about the siren for locating decided I'd give it try. Found a wide dry wash with plenty of cover for critters to spend the day in. From the top of the wash I had a good view of anything that that would move. I set up and turned the caller on with the siren full blast. Withinseconds I had a group of illegals bust out of the cover and scattered like quail, they too reacted to a siren.