Re: Sirens to locate coyotes
One other thing, just because they don't answer a Siren, or Howls for that matter, doesn't mean there are no coyotes in the area.
Lost count of times I spotted coyotes eyeballing me from a distant rigdetop shortly after using the siren. They didn't answer, but they got curious enough to look. Also, many times I've gotten no response and saw no coyotes but walked in and made a set or two anyway...........walked out dragging dogs.
I still haven't figured out why sometimes they will howl and other times they wont. Sometimes they will howl their damned heads off all day long, other times they wont make a sound no matter what I do.
Aim small = Miss small