http://www.searchreslt.com/motion-activated/

What type of equipment did photographers use back before digital to do motion activated nature photography?
was there any equipment back before digital that allowed the photographer to set up a camera in the wild and it would take photos when it detected motion. Any links to old equipment would be much appreciated.
when you say before digital your asking what did film photographers use to detect motion? they used.........motion sensors just like security alarms use motion detectors they have been around long before digital cameras there are mechanical ones and electronic ones and laser ones and all sorts now, the early ones where mechanical
Motion activated “Attack Creeper”